fastest-threading reel ever developed . . . the audiotape C-Slot Reel , BETTER THAN EVER! The popular C-Slot reel — the fastest, easiest-threading reel ever developed — has been structurally redesigned. It's now stronger than ever and even more con- venient than before. Since the revolutionary reel design was introduced about a year ago, engineers have carefully checked service experience on all types of machines under all operating conditions. This study pointed the way to still further improvements. Now, a slimmer, smoother tape slot gives a virtually unbroken hub surface for smoother winding under even the highest tape tension. A reinforced beveled edge guides the tape more easily into the C-slot. Inside the hub, extra "ribs" have been added and the bonding area has been increased by 50%, making the entire struc- ture practically indestructible. No other reel can approach the C-slot for fast, easy threading. And the new, im- proved design is now standard for all 5" and 7" reels of Audiotape— an extra-value feature at no extra cost! Another important reason why it pays to specify Audio- tape for every recording need. AUDIO DEVICES, INC. 444 Madison Ave., N. Y. 22, N. V. In Hollywood: 840 N. Fairfax Ave. In Chicago: S428 Milwaukee Ave. Export Dept: 13 East 40th St., N.Y. 16, N.Y. Cables "ARLAB" Hi* cmdxo record Published by AUDIO DEVICES, INC. 444 Madison Avenue, New York 22. N.Y. cuuliocitxcs trnfl ioto py audiofilm aiuliopmnts 1958-1959 AUDIO tt£COKl> October, 1958 23 QUICK FACTS ON MAGNETIC TAPE RECORDERS (Additional information can be obtained by writing to the manufacturer) Manufacturer ALTO FONIC MUSIC SYSTEMS, INC. 935 Commercial Street, Palo Alto, Calif. Model and Price Continuous automatic tape reproducers for rack mounting Model 450D with pre-amp $855.00 Model 450DA with combination pre-amp power amplifier and mixer $972.00 Add $30.00 for 7 '/, ips Model 465 Deluxe Console $1191.00 Model 466 $1140.00 Frequency Response 50-10,000 cycles ( =2 db) at 7'/ 2 ", sec. 50-15,000 cycles (=4 db) at 71/2"; sec. 50-7500 cycles (±2db) at 3V4" sec. as above AMERICAN CONCERTONE Division of American Electronics, Inc. 9449 West Jefferson Blvd. Culver City, Calif. RACK SERIES Model 455-50WR $1397.00 Model 458 Dual Unit — Automatic intermix programming system $2275.00 Model 480 Ad Merchandiser $345.00 Model 482 (Price on request) Model 483 (Price on request) SERIES 30 Model 31, full track recorder $695.00 Model 32, half track recorder $695.00 Model 33, stereo recorder $995.00 Modification ST, to full track, half track and two channel stereo $204.00 as above Data Ampex-designed, proved, licensed. Plays dual track, pre- recorded, 8-hour tapes continuously. Plays 4 hours on one track, reverses automatically and plays 4 hours on the opposite track, reversing and repeating indefinitely. Signal-to-noise ratio — 50 db. Simplest mechanism driven by one hysteresis synchronous motor and unique Ampex reel take-up system. Includes plug-in electronic section with positive metallic tape impulse automatic re- versing. Exclusive reel change switch. Operates with variety of accessories including Ad Merchandiser. Model 450DA, same as above except has combination pre-amp and 12-watt high fidelity power amplifier with 4, 8, 16 ohm and 70-volt output. Individual volume con- trols for music, microphone, chimetone pager, Ad Merchandiser: master gain control, and tone control. Receptacle for timers, microphones, low impedance transformer, and Ad Merchandiser. Model 465 contains Ampex-designed Model 450DA. Completely automatic. Space for Ad Merchandiser unit in top control section exposed by lifting hinged lid. Master volume control and monitor volume control. Ex- tended range monitor speaker in a separate enclosure within console. 37" high, 34" wide, 18" deep. Shipping weight, 161 lbs. Model 466. The same basic unit as 465, in cabinet of Zolotone (no front panel). Master and monitor volume controls and automatic timer control. (TlO). (Without T-10 Timer, $1095.00) Monitor speaker included. A typical rack installation including rack, 450D, moni- tor panel, T-10 Timer panel, 50WR 50-watt high fidelity amplifier and blank panel. Other combinations are pos- sible with the ad merchandisers, various power ampli- fiers, timers, chimetone, and voice paging. 50-7500 cycles (=2 db) at 3 % "/sec. 50-15,000 cycles ( =2 db) at 15" /sec. 50-12,000 cycles ( =2 db) at 7'/j"/sec. 50-6,500 cycles (±2 db) at 3 3/4 " sec. An automatic programming system for FM radio sta- tions, wired music, community television networks, closed circuit systems, etc. Timers and silent sensing provides switching between any desired number of selections from each 450D. Ad Merchandiser also can be used to insert announcements automatically. Provides for automatic insertion of a series of announce- ments one at a time, between musical selections, with built-in silent sensing. Playback only. Selector switch permits selection of 1 to 10 musical selections between ads. Switch provides for monitoring cartridge without affecting background music. Easy to change snap-in Cousino cartridge 1 to 28 minutes. Larger cartridge pro- vides up to one hour. Mounts in top panel of Alto Fonic consoles, or in drawer of rack systems. Meets all specifications of 450 unit. Plugs into 450DA. Model 482 is same as Model 480 but self-contained and automatic. Play back only. Heavy duty. Cousino car- tridge for any length announcements totaling 2 to 60 minutes. Self contained 3-watt amplifier and speaker. High impedance output available for other amplifiers. External switch will trigger start or built-in timer may be set for time intervals from 5 minutes to 1 hour. Model 483 is same as 482 with playback /record combina- tion including microphone and level indicator. Grip to talk switch controls recording. All Series 30 models have following features: Two-speed direct drive hysteresis synchronous motor and two torque motors; 3 heads with provision for 2 more; 4Yz" VU- type meter; 2-channel input mixer; A-B test fader for cueing/editing switch. Instant speed selection of 15"/ sec. and 7y 2 " /sec or 3J4"/sec and 7!/ 2 "/sec. Signal-to- noise, 55 db by proposed NAB Standard (full track). Total harmonic distortion, 2% at zero VU. Total flutter and wow, less than 0.1% rms at 15"/sec, 0.2% at IVi I sec. Fast forward and rewind, less than 60 sec. for 2500 ft. High impedance microphone input and unbalanced bridging input. Output impedance, cathode follower, 600 ohms with plug-in transformer. — The World's Finest Magnetic Recording Tape Description SUPER-lHIN'-udi-op. SUPER-THIN AUDIOTAPE on 1/2 -mil "Mylar" (in the Yellow Box) Twice as much recording time per reel as stand- ard plastic-base tape. Suitable for extended- play applications where tape tension is not ex- cessive. Series 31. SSrO-lH qiicliotnpp o.. TEMPERED 'Mylar SUPER-THIN AUDIOTAPE on "Tempered" "Mylar" (in the Yellow-and-Red Box) Twice as much recording time per reel as standard plastic-base tape, and is twice as strong as other double-length tapes. Will not stretch or break on any tape recorder — will not dry out or embrittle with age. Series 31T. MASTER LOW PRINT-THROUGH AUDIOTAPE on Plastic Base The finest, professional-quality recording tape. Base material, 1%-mil acetate. Maximum fidel- ity, uniformity, frequency response and freedom from noise and distortion. . . . Plus low print- through. Series 51M. MASTER LOW PRINT-THROUGH AUDIOTAPE on l'/ 2 -mil "Mylar" Super-durable tape that meets highest stand- ards of performance. Withstands extreme tem- peratures and is virtually immune to humidity. Gives maximum tape life under any conditions. . . . Plus low print-through. Series 71M. Type No.* 1231 2431 1231T 2431 T 4831T-R ±4831T-FS 651-M 1251-M 2551 H-M 2551R-M ±2551 FS-M 5051 H-M 5051R-M 671-M 1271-M 2571 H-M 2571 R-M ±2571 FS-M Length 1 200 ft. 2400 ft. 1 200 ft. 2400 ff. 4800 ft. 4800 ft. 600 ft. 1200 ft. 2500 ft. 2500 ft. 2500 ft. 5000 ft. 5000 ft. 600 ft. 1 200 ft. 2500 ft. 2500 ft. 2500 ft. Reel- 5 Plastic 7" Plastic 5" Plastic 7" Plastic IOV2" Aluminum Reel 10'/ 2 " Fiberglass (RETMA) 5 Plastic 7" Plastic NARTB Hub lO'yV Aluminum Reel 10% " Fiberglass (RETMA) NARTB Hub 14" Aluminum Reel 5 Plastic 7" Plastic NARTB Hub 10V2" Aluminum Reel lOVb" Fiberglass (RETMA) List Price S 5.00 9.25 6.50 11.95 26.90 26.90 2.75 4.30 9.80 12.50 12.50 19.55 26.00 4.85 8.05 14.65 17.40 17.40 * Type Numbers listed cover red oxide wound on reel with OXIDE IN. For tape wound with Oxide Out, change last digit of Type No. from "I" to "0." E.g. Audiotape t250 covers 1200 ft. reel of plastic base tape wound with Oxide Out. t COLORED PLASTIC REELS. Audiotape on 5" and 7" plastic reels can be supplied on colored reels ot no increase in price when ordered in lots of 30 reels or more of any one color. To designate color of reel (Red, Yellow, Green or Blue) odd letters "RR" ond "YR," "GR" or "BR" to Type No. listed. E.g. — Type t251YR covers 1200 feet of standard plastic-base tope on Yellow Reel. Type 1251 GBR covers 1200 feet of Green plastic-base tape on Blue Reel. (: "FS" in Type No. indicates Fiberglass reel with solid hub and 5/16" center hole. Audio Accessories Item CORRUGATED MAILING BOXES Strong, re-usable containers for 5", 10%" reels. 7" and RECORDING HEAD CLEANER Especially formulated for use on re- cording heads. Contains silicone sol- vent. Superior to carbon tetrachloride. One-ounce bottle with brush. AUDIO SELF-TIMING LEADER TAPE A strong, durable leader tape of white "Mylar" ma- terial with spaced markings to permit accurate rate time of leader intervals. Each box contains 100 feet, V4" wide. ADHESIVE REEL LABELS Provide positive identi- fication of your tapes, right on the reel. Sim- ply press to apply, pull off to remove. Envelope of 30, 2" x W labels. Type No. 5M 7M 10M 1HC 31 30 A L List Price $.15 .20 .30 65 55 .20 Item AUDIO HEAD DEMAGNETIZER ' Removes all permanent magnetism from recording and reproducing heads in a matter of seconds. Includes 7-foot cord and is individually boxed. •*W«~<» J AUDIO HEAD ALIGNMENT TAPE =t V Pre-recorded at 2,000, 10.000 and 15,- ^n 000 cps (15"/sec.) with precisely cor- / rt-ct head alignment. Each box contains ^^^3 Hf 300 ft. on a 4" reel and instructions. how to make GOOD TAPE RECORDINGS This handbook of tape recording con- tains up-to-the-minute information of in- terest and practical value to every tape re- cordist. Profusely illustrated with photo- graphs, charts and diagrams prepared especially for this book, it contains 150 pages of valuable information on all phases of modern tape recording. Type No. 400 200 List Price 10.00 10.00 Clothbound 25C 2.50 Paperbound 15P 22 41 OIO RECORD October, 1958 The COMPLETE LINE of professional quality AUDIOTAPE Manufacturer Description PLASTIC-BASE AUDIOTAPE on l'/j-mil cellulose acetate (in the Red Box) Meets the most exacting requirements of the professional, educational and home recordist at minimum cost. Known the world over for its matchless performance and consistent uniform quality. Series 51. AUDIOTAPE ON I'/j-MIl MYLAR* (in the Green Box) A premium-quality professional tape that pro- vides the utmost in mechanical strength and immunity to temperature and humidity. Will not dry out or embrittle with age. Series 71. "DuPont Trade Mark "LR" LONGER-RECORDING AUDIOTAPE on 1-mil "Mylar" (in the Black -and-Red Box) 50 ( c more recording time per reel. The strong, super-durable polyester film base assures trouble-free operation even under severe con- ditions of heat and humidity. Series 61. PLASTIC-BASE "LR" AUDIOTAPE on 1-mil cellulose acetate (in the Blue Box) 50' ( more recording and playback time on low- cost 1-mil cellulose acetate base, affording maxi- mum economy for applications where high strength is not required. Series 41. Type No.* 151 351 651 1251 255 1H 255 1R ±2551FS 5051 H 505 1R 671 1271 2571 H 2571 R ±2571 FS 5071 H 5071 R 261 '61 1861 366 1H 3661 R ±3661 FS 7261 H 726 1R 941 1841 364 1H 3641 R ±364 1FS 7241 H 7241 R Length 150 ft. 300 ft. 600 ft. 1 200 ft. 2500 ft. 2500 ft. 2500 ft. 5000 ft. 5000 ft. 600 ft. 1200 ft. 2500 ft. 2500 ft. 2500 ft. 5000 ft. 5000 ft. 225 ft. 900 ft. 1800 ft. 3600 ft. 3600 ft. 3600 ft. 7200 ft. 7200 ft. 900 ft. 1800 ft. 3600 ft. 3600 ft. 3600 ft. 7200 ft. 7200 ft. Reel- 3 Plastic 4" Plastic 5" Plastic 7" Plastic NARTB Hub IOV2" Aluminum Reel 10'/ 2 " Fiberglass (RETMA) NARTB Hub 14 Aluminum Reel 5 Plastic 7" Plastic NARTB Hub IOV2 Aluminum Reel lO'/j" Fiberglass (RETMA) NARTB Hub 14 Aluminum Reel 3 Plastic in Self-Mailer Pkg. 5" Plastic 7" Plastic NARTB Hub 10 1 / 2 " Aluminum Reel lO'/j" Fiberglass (RETMA) NARTB Hub 14 Aluminum Reel 5 Plastic 7" Plastic NARTB Hub 10y 2 Aluminum Reel 10'/ 2 " Fiberglass (RETMA) NARTB Hub 14 Aluminum Reel Miscellaneous AUDIOTAPE Items List Price S 0.70 1.35 2.25 3.50 8.50 10.90 10.90 17.00 22.10 4.25 7.00 12.75 15.15 15.15 30.30 36.30 1.00 3.75 6.50 12.50 15.00 15.00 26.00 32.00 3.50 5.50 10.00 12.85 12.85 20.00 26.00 Item Type No. Description List Price ^_ ^ COLORED PLASTIC-BASE AUDIOTAPE /^^^■^*V on iy 2 -mil cellulose acetate l^gJ^^^U^ ( ' n same box as above ^1 with label for color) \l^"t AMji Green and blue colored Audiotape, in conjunc- ^AC^**V|£^i tion with the standard red-brown tape, provide nSSE it^M instant visual identification of recorded selec- jf tions spliced into a single reel (as shown) — permit fast and easy color cueing and color coding. Eliminate need for identifying leaders between selections. GREEN BLUE LENGTH REEL 151G 351G 651G 1251G 2551 HG 255 IRG ±2551 FSG 5051 HG 505 IRG 151B 351B 651B 1251B 2551 HB 255 IRB ±2551 FSB 5051 HB 505 IRB 150 ft. 3" Plastic 300 ft. 4" Plastic 600 ft. 5" Plastic 1200 ft. j 7" Plastic 2500 ft. NARTB Hub 2500 ft. lO'/j "Aluminum Reel 2500 ft. ! 10'/ 2 " Fiberglass (RETMA) 5000 ft. NARTB Hub 5000 ft. 14" Aluminum Reel S .70 1.35 2.25 3.50 8.50 10.90 10.90 17.00 22.10 EMPTY AUDIOTAPE REELS IN INDIVIDUAL BOXES ^^^ Standard i^^5*^!*liBW Reels 3PB 4PB 5PB 7PB 10RB 10FS 14RB 10H 3" Plastic in Box 4" Plastic Reel in Box 5" Plastic Reel in Box 7" Plastic Reel in Box I0y 2 " Aluminum Reel in Box 10'/ 2 " Fiberglass (RETMA) in Box 14 Aluminum Reel in Box NARTB Metal Hub .25 .45 .60 .75 4.00 4.00 7.40 .70 Plastic ~~ Reels 5PBR 5PBY 5PBG 5PBB Red \ Yellow 5 „ p|asf . c Ree| jn B/, sec. 30-20,000 cycles (=2 db) 50-15,000 cycles At 33/, sec. 30-15,000 cycles (=2 db) 50-10,000 cycles 300- 2,500 cps 100- 3,000 cps 50- 5,000 cps 50- 7,500 cps 50- 7,500 cps 50-15,000 cps J as above Weathertite "Magnemites" (Add $30 to price of Std. Units) VU "Magnemite' -CI Model 610-AV 610-BV 610-CV 610-TV 610-DV 610-EV "Flyweight Magnemite' 310-A "Secret Recorder" 210-B 210-BC Speed in sec. 1 7 /e 33/ 4 7 '/, 15 '714 1% 3% 7'/i 7'h 15 1% l 7 / 8 3% Price $365 315 345 365 385 425 $340 290 320 340 360 400 $349 as above Dato Each Crescendo console includes a Model 960 stereo- phonic tape recorder-reproducer, described on page 3, plus: a Garrard 4-speed record changer with stereo/ monaural diamond stylus pick-up, push-button Audio Control Center, Ampex 2-channel AM and FM stereo- phonic tuner, two matched Ampex amplifier speaker units consisting of twin 15 -watt amplifiers and six speakers — a 12" bass, 8" mid-range and one omni- directional high-frequency projector for each channel. Available in Contemporary Walnut, Traditional Ma- hogany, Contemporary Teak, French Provincial. Completely self-contained, battery-operated portable- with spring motor drive. Models 610-SD and -E, one track. Four speed models 610-DM and -EM, one or two track. All others dual track. Winding interval, 3 to 15 min. Motor can be rewound while operating. Indicator signals 30 sec. before motor rewind. Play- back through headphones or external amplifier. Optional erase. Dimensions, 11" x 8" x 5" for 610-A and B; 11" x 10" x 7" for all others. Weight, 12 to 17 lb. 300- 2,500 cps 100- 3,000 cps 50- 5,000 cps 50- 7,500 cps 50- 7,500 cps 50-15,000 cps 300- 2,500 cps 100- 3,000 cps 50- 5,000 cps 50- 7,500 cps 50- 7,500 cps 50-15,000 cps 100- 3,000 cps $369 SINGLE CHANNEL 1 7 /e 3% 7'/i 15 $345 365 385 405 DUAL CHANNEL 'Magneloop" Continuous Loop Tape Recorder l 7 /s $495 33/ 4 515 7 V? 535 15 555 'Stereo-Magnemite" *E= _^ T \ ^ i .** h 611-C 61 1-D 611-E -..*■ 3% 7Vl 15 $355 395 435 100- 3,000 cps 50- 5,000 cps All standard "Magnemites"' available in weather-tight sealed aluminum cases with tongue and grooved edges and built-in neoprene gasket seals. Will successfully withstand severe environmental conditions. Satin fin- ished case anodized to resist corosion. Completely self-contained battery-operated portables with spring motor drive. 610-DV and EV are single track — others, dual track. Winding interval 3 to 30 min., de- pending on tape speed. Motor can be rewound while operating. VU meter for measuring record level, output level, "A" battery and "B" battery. Playback through earphones or external amplifier. PM erase optional at extra cost. High and low level inputs. Output imped- ance, 50,000 ohms. Incoming signal can be monitored by VU meter or earphones. Dimensions, 6]/ 2 " x 9'/ 2 " x 14". Weight, approx. 19 lb. Portable, battery-operated electric motor driven record- ers with single tape speed. Models 310-SD and 310E are single track, others dual track. Max. reel size, 5". Rewind time, 2 min. Earphone monitor and playback. No erase. PM erase available as optional feature. Pow- ered by 5 replaceable mercury batteries. Dimension* 5l/ 2 " x 9" x 12". Net weight: 8 lb. 50- 2,500 cps 50- 7,500 cps 50-10,000 cps 50-15,000 cps 50- 2,500 cps 50- 7,500 cps 50-10,000 cps 50- 1 5,000 cps 10O- 3,000 cps 50- 7,500 cps 50- 1 5,000 cps Hidden in zipper compartment of briefcase, operates anywhere on dry cell batteries. Hidden microphone and concealed start-stop clasp switch. Dual track, single or 2-speed recorder operates on replaceable batteries. Maximum reel size 5". Rewind time, 2 min. Earphone playback. No erase. PM erase available as optional fea- ture. Weight complete, including briefcase, 11^ lb. Designed to record and play back any messages, musi- cal programs or sound effects up to 60 min. in length on cartridge-loaded endless loop of std. 14" tape. Auto- matic erase. Push-button start and stop, switch or relay remote control. Electronic-eye recording level indicator. Microphone and bridging inputs. Output impedance, 600 ohms. Output level, +6VU. Headphone monitor- ing. Standard rack panel mounting or custom rack cabinet. Size, 19" x &y 4 " x 9l/ 2 ". Weight, 24 lb. Portable, stereophonic battery-operated spring-motor recorder. Mechanically similar to 610 series. Two sep- arate channels for stereophonic recording. Independent gain for each channel. Can be monitored with binaural headphones while recording. Optional P.M. erase. In- put impedance, 1 Megohm. Output impedance, 50,000 ohms. Size, 8l/ 2 " x 11" x 10". Weight 17 lb. Monufocturer WEBSTER ELECTRIC — ELECTRONICS DIVISION Racine, Wisconsin Model and Price "Ekotape" Model 320 $279.50 "Ekotape" Stereophonic Model 330 $439.50 WILCOX-GAY CORPORATION Charlotte, Michigan WILCOX-GAY CORPORATION, MAJESTIC INTER- NATIONAL SALES CORP. DIVISION 743 N. LaSalle St. Chicago 10, Illinois "Ekotape" Model 310 A-V Control Center $399.50 Frequency Response 30-15,000 cycles at 7 y, "/ sec. as above "Ekotape" Model 340 Stereo Deck $99.50 Model 342 Stereo Deck $119.50 STERecordio Model 800 Stereo Portable $319.95 Speaker $69.95 Stereo Record Amplifier $89.95 WOLLENSACK OPTICAL COMPANY 20 E. 21st St. Chicago 16, Illinois Grundig Majestic Model TK830W 3D $399.95 Data Portable, two-speed, dual-track recorder with monomatic single-knob control. Meter type recording level indicator. Power output, 8 watts max. Distortion, 1.6%. Total harmonic at 6 watts, 400 cycles. Signal-to-noise, 43 db. Wow and flutter, 0.2% max. at 7]/ 2 /sec. Odometer type selection finder. Fast forward and rewind ratio, 15 to 1. Two built-in speakers — 6" x 9" oval PM and 3" round. External speaker jack and output for hi-fi preamp. Inputs for microphone and radio-phono jack. Includes crystal mike 11 and manual instant start-stop control. Dimensions- 131/2 x 15". Weight, 35 lbs. Similar to Model 320 above, except designed for mon- aural record/playback and stereophonic playback with stacked heads. Includes two amplifiers for stereo play- back — one used for half-track monaural record and playback. Each amplifier has 12 watts maximum output. Weight, 44 lbs. Matching stereo speaker cabinet, includ- ing 6" x 9" oval and 3" round speaker, available at $59.50. as above as above 40-15,000 cycles ( ~2 db) at 7V 2 "/sec. New audiovisual control center for use with any auto- matic slide or strip film projector. Eliminates need for audible signal. Has two recording heads that record over full width of tape. One records from mike or radio. The other records 1000-cycle signal that operates an auto- matic projector. Two speeds: 7'/2 and 3J4 'P s - Other specifications same as Model 3 20 above except for fol- lowing: output, 12 watts: no preamp output jack: micro- phone is accessory. New tape decks for stereo recording and playback. Speeds: 7'/2 and 3^4 'P s - Monomatic central control for tape direction. Second control for speed selection and on/off. Connections: two record/reproduce, two erase. Automatic stop. Odometer type selection finder. Wow and flutter: 0.2% at 7'/ 2 ips, 0.3% at zy 4 ips. Dimen- sions: liy 4 x 9 x 7J/2". Model 340 does not have auto- matic stop or selection finder. Stereo playback preamp for Models 340 and 342 is $59.50. Stereo record-playback preamp is $159.50. New portable for monaural record-playback and stereo playback plus stereo record with use of stereo recording amplifier. Speeds: 7'/2 and ^Va ips. Push button controls. Dual volume controls. Interlock prevents accidental erase. Two neon recording level indicators. Two 5x7 oval speakers. Fast forward and rewind: 1200 feet in 2% min. Integral pointer selection finder. Wow and flutter: 0.3% at 71/2 ips, 0.5% at i% ips. Signal-to-noise ratio: 35 db. Outputs: two for external speakers. Inputs: microphone and radio/phono plus special jacks for amplifier and bias oscillator. Dimensions: 14'/> x 15'/ 7 x 12" Weizht- 35 lbs. Model T-1500 $199.50 Stereo Model T- 1 500 $229.50 40-16,000 cycles ( =3 db) at 71/5"/ sec. 50-10,000 cycles ( -3 db) at 3% "/sec. 40-15,000 cycles ( =3 db) at 7 1/2" /sec. 40-7,500 cycles ( -3 db) of 3% /sec. Portable, dual-track recorder with 3%" and 7I/2" tape speeds. Magic eye recording level indicator. Tape coun- ter, program index. Hysteresis synchronous motor. Flut- ter and wow. less than 0.1% at 7l/2"/sec, less than 0.27c at 3%"/sec. Signal-to-noise ratio, 55 db. Harmonic distortion, less than 1%. Fast forward and rewind ratio, 30:1. Power output, 6 watts undistorted. Three high- impedance inputs, one high-impedance and one low- lmpedance output. Includes three wide range PM loud- speakers. Dimensions, 16" x 17" x 8". Weight, 35 lbs. Portable, two-speed, dual track recorder with 10-watt power output and interlocked kevboard control that can be operated in any sequence. Flutter and wow, less than 0.3%. Signal-to-noise, 48 db. Overall distortion less than 0.8%. Fast forward and rewind, 150'7sec. Dual level record indicator, revolution index counter in start stop lever. Automatic drive roller release when power switch is off. Pre-amp output for Hi-Fi system. Extension speaker jack. Built-in automatic head demagnetization. Remote foot control available. Weight, 18 lbs. Stereo model is same as above with built-in lower channel preamp added and without built-in automatic head demagnetization. All specifications and performance data on tape recorders listed in this directory are based on information supplied by the manufacturer. Performance data are generally based on average values and individual machines sometimes vary widely from published figures, depending on the amount of quality control exercised in manufacture. Prices subject to change without notice. Consult manufacturer or local dealer for exact price, as some prices are list and others net. 20 AUDIO RECORD October, 1958 Manufacturer VIKING OF MINNEAPOLIS 9600 Aldrich Ave. So., Minneapolis 20, Minnesota V-M CORPORATION Benton Harbor, Michigan Model and Price OCv. • c a a "95" SERIES Tape Deck (Prices available on request) Frequency Response "Tape-O-Matic' Portable Model 710A $189.95 WEBCOR, INC. 5610 West Bloomingdale Ave., Chicago 39, Illinois "Tape-O-Matic" Stereo /Playback Portable Model 714 $225.00 "Celeste" Stereo /Playback Table Model 750A $275.00 Webcor "Regent" Model 2910 $159.95 Model 2820 $199.95 Dependent upon type of heads supplied Data 40-15,000 cycles (±5 db) at 7 '/j 7 sec. 40-15,000 cycles (±5 db) at 7y, "/sec. Webcor "Royal" Model 2911 $199.95 Model 2821 $239.95 Model 4820 (Speaker) $79.50 Model 2991 $239.95 Webcor "Imperial" Model 2827 $319.95 Model 4728 (Speaker) $119.95 Webcor 'Royal Coronet" Model 2822 $289.95 Model 2955 $249.95 Model 2923 $289.95 Model 4923 (Speaker) $139.95 50-12,000 cycles at 7'/,7sec. 70-7,000 cycles at 3% "/sec. Broadcast type recorder designed for professional appli' cations. Available with any of three drive pulleys: 15 — Wll 71/2 — 3%; or iy 4 — V/s ips. Three motors: hysteresis synchronous drive; 6-pole induction torque motors. Space for six interchangeable heads allows head configurations for any tape application. Rewind and fast forward time, 70 sec, for 2400 feet tape. Instantaneous dynamic braking, less than 2 sec, from fast forward or fast rewind. Signal-to-noise ratio: 55 db or better. Wow and flutter: less than 0.1% at 15 ips, less than 0.15% at 7J/2 ips rms. Deck is available with matching VU Record /Playback Amplifiers, for rack mounting. Portable, dual-track recorder with 3%" and 7]/2"/sec. tape speeds and push-button control of all operating functions. Convertible to stereo playback. Power output, 8 watts. Signal-to-noise ratio, better than 45 db. Less than 0.4% RMS flutter and wow. Cathoptic tuning eye, automatic shut-off, and monitor switch. Concealed 60- cycle hum control and noise balance control. Two built-in speakers. Jacks for external amplifier, two-way external and stereo output. Separate bass and treble control, microphone and phono adapter plug included. Shipping weight, approx. 32 lbs. Portable, two-speed dual-track stereo recorder. "Stacked- staggered" stereo playback switch. Monaural record /play- back. Power output, 8 watts. Signal-to-noise, better than 45 db. Flutter and wow less than 0.5% RMS. Cathop- tic tuning eye and automatic shut-off. Two speakers, external amplifier jack, two-way external speaker jack, stereomatic output receptacles. A.C. receptacle. Inter- locked push-button controls. Instant pause switch, moni- tor switch and tape index counter. Separate bass and treble controls. Weight: 32 lbs. Model 750A is a two-speed dual track stereo recorder, similar to Model 714, except with two 8" woofers and a 3.5" tweeter. Blonde or mahogany cabinets. Optional legs convert it to consolette. Weight: 45 lbs. 50-12,000 cycles at 7V,"/sec. 70-7,000 cycles at 3%7sec. (as above) 40-15,000 cycles at 7i/ 2 '7sec. 50-10,000 cycles at 3% 7 sec. Model 2810 — Portable dual track recorder. Speeds: '! / 2. 3% and 1% ips. Amplifier has five watts peak power. 5" x 7" permanent magnet oval speaker. Signal- to-noise ratio: 45 db. Wow and flutter less than 0.4%. Four-pole motor, numerical tape counter, editing key, recording level indicator, monitor control. Jacks for input, external amplifier, external speaker. Weight: 34 lbs. Model 2820 — same, except with separate pre-amplifier for stereo playback. Additional stereo speaker system required. Model 2911 — Same as Model 2810 except for two speeds (7J/2 and 3^4 ips); "No reel turnover" feature that plays 3, 5 or 7-inch reels in two directions, with head transfer for track change; two speakers: 5" x 7" woofer and 4" tweeter; two recording heads, two four- pole motors; four-way master control. Model 2821 — same, except with separate pre-amplifier for stereo playback. Model 4820 stereo speaker system required. Model 2991 — same as 2911, except with built-in AM radio tuner. Radio may be used independent of recorder. Model 2827 — similar to Model 2821, except with 8-watt peak power amplifier, built-in preamplifier for stereo- phonic playback using a separate two-section speaker system, Model 4728. Recorder includes built-in 5" moni- tor speaker. Two recording heads; one monaural rec- ord/playback head, the other a stacked monaural and stereo playback head. Model 2822 — Same as Model 2821, except with 8-watt peak power amplifier and three speakers — one 6" x 9" woofer and two 4" tweeters. Weight, 51 lbs. Model 2955 is same as Model 2822 except for additional speed: l^g ips. Has 5-watt amplifier output, in consol- ette cabinet. Add $10.00 for limed oak, maple or wal- nut finish. Uses Model 4923 speaker system. Add $10.00 to speaker price for limed oak or cherry finish. Model 2923 is same as Model 2955 except in console cabinet. Add $10.00 for limed oak or cherry finish. Manufacturer AUDIO- MASTER CORP. 17 East 45th St. New York 17, N. Y. Model and Price Butoba Portable Recorder $345.00 Frequency Response 50-9,000 cycles (±3db) Selectophon Tape-Record-Player $379.50 PERFECTONE Continuous Tape Player S730-S830 AUDIOMATION LABORATORIES 7230 Clinton Rd. Upper Darby 23, Pa. BELL & HOWELL COMPANY 7100 McCormick Road Chicago 45, III. CONCERTCASTER Including Perfectone and amplifier S835-S1010 40-12,000 cycles (±2 db) 40-15,000 cycles at 7 y, 7 sec. 40-8,000 cycles at 3 y 4 "/sec. Data Portable, transistorized, dual-track, battery-operated re- corder with push-button controls. Driven by special spring-wound motor with elapsed-time indicator. Tape speeds: 3% and U/g. Running time is 20 and 40 minutes respectively. Multi-purpose head: record and playback- erase. Volume level indicator is magic eye tube. Play- back through built-in oval speaker or external amplifier. Telephone conversation recorder adapter optional. Selectophon is a tape-record-player which records up to 6 hours on a 35 mm endless tape and plays 33, 45 and 78 rpm records. Built-in amplifier and speaker. as above y — ■ <* — t * J A** —0 (Write to manufacturer for prices) Model 600-M Mahogany $329.50 Model 600-B Blond Oak $344.50 Model 600-1 Plywood $329.50 Heavy-duty rack type tape phonograph for providing up to 8 hours of unattended, background music without repetition. Two speeds. Automatic reversal and shut-off with unmodified tape. Automatic, continuous re-cycling or shut-off controlled by switch on panel. Simple con- trols, light tape tension. Easy and precise head alignment. Signal-to-noise, better than 50 db at 7J/27sec. Hysteresis synchronous capstan motor and two 4-pole torque motors. Max. reel size, 14". Price depends on type of amplifier and number of speeds desirecf. This is a complete package consisting of the Perfectone, cabinet and power amplifier. The 7/32" crystal glass cover rests on a sponge rubber gasket to exclude dirt and dust. The mechanism pivots for easy access. Price de- pends on number of speeds and type of amplifier desired. as above 50-15,000 cycles at 7i/ 2 "/sec. A. AUTOSPERSER The new Autosperser has two Perfectone tape players, a control panel for either wired or multiplex service, and an Adcaster tape player for storecasting or similar special services. The Adcaster provides up to 30 minutes of recorded commercial on one track and automatically re- winds and cues to first commercial when played through. The twelve-station programming cycle repeats auto- matically. Automatic standby. New Autosperser-24 System available that is identical to standard Autosperser System excepting control panel has 24-station programming cycle. B. CONSECUTOR The Consecutor System is comprised of two Perfectone 8-hour machines and a control panel. For unattended operation in broadcast or wired service. Operating cycle: Machine #1 plays track A, reverses, plays track B, re- verses, shuts off, starts machine #2. Machine #2 per- forms same cycle and restarts machine #1. Automatic standby. Provision for manual operation so that tapes may be changed without interrupting program. C. VARYTAPE Consists of two identical Perfectone automatic 8-hour tape-handling mechanisms arranged for unlimited varia- tion of program continuity by the automatic inter-mixture of the music content of any two reels. Automatically stops one mechanism and starts the other whenever 30 seconds or more of silence occurs on the tape being played. Permits up to 16 hours of music without repeti- tion. Cycling fully automatic. Automatic standby. New portable stereo recorder with 71/2 ips and 3% ips speeds. Monaural record /playback and stereo play- back. Twin built-in, extended-range, side-mounted 8" speakers reproduce both monaural and stereo tapes. Three-motor drive. Two-position selector dial for mon- aural/stereo. Push button controls. Fast forward and rewind. Twin record-level indicators. Resettable pro- gram indicator. Wow and flutter less than 0.2% at V/2 ips. Harmonic distortion less than 1%. Signal-to-noise ratio exceeds 40 db minimum. Cut-off mechanism auto- matically stops reel at end of tape on record or playback. Two inputs; microphone; radio/phonograph/TV. Two outputs for external speakers. Weight: 45 lbs. AUDIO RECORD October. 1958 19 Manufacturer BELL & HOWELL COMPANY 7100 McCormick Road Chicago 45, III. Model and Price Model 730GS Stereo Portable $269.50 Model 775G Portable $199.95 Model 770G Monaural Portable $169.95 Model 771 "Stereotone" Stereo Portable $199.95 Model 076318 Amplifier-speaker $99.95 BELL SOUND SYSTEMS, INC. 555 Marion Road Columbus 7, Ohio DAVID BOGEN CO., INC. P.O. Box 500 Paramus, N. J. P100 Tape Transport T210 $109.95 T211 $119.95 T212 $129.95 T213 $149.95 T216 $259.95 T218 $314.95 RP 120 Record / Playback Pre-Amplifier $59.95 Playback Pre-Amplifier $39.95 Model BT-205-1B Monaural Record with inline Stereo Playback $224.50 Model T-207-S Home Stereo System $695.50 Model TR-30 $449.50 Frequency Response 50-15,000 cycles at 7Vi "/sec. 50-13,000 cycles ( =4 db) at 7 y 2 "/sec. as above 25-12,000 cycles (=2 db) overall record- playback extends to 15,000 cycles playback only 30-12,000 cycles at 7 '//'/see. as above 40-15,000 cycles at 157sec. 50-10,000 cycles at 7'/, "/sec. Data Manufacturer Portable monaural recorder and playback instrument equipped with stereophonic in-line playback head, stereo- phonic output jack. Tape speeds: iy 2 or 3% >P S - Stereo- phonic playback through companion amplifier speaker, or radio, phonograph, TV with pre-amplifier. Round 10- inch speaker positions 2 ways. Automatic reel stop. 3 -motor operations. Rewinds 1200 feet in 60 seconds. Less than 3% distortion at 7 watts. Wow and flutter below 0.2% maximum at 7\/ 2 ips. Signal-to-noise ratio above 40 db minimum. Electromagnetic pushbutton con- trols. Accidental erasure interlock. Accurate resettable program indicator. External amplifier and speaker jacks. Dimensions: 16'/" x 17" x 9y 2 ". Weight: 39 lbs. Two-speed, dual track portable tape recorder taking reels up to 7" diam. Five-button control. Two 5'/4" speakers. Three-position switch for normal, monitor or public address operation. Runs at 7\/ 2 " or 3J4" speeds. Twin-level recording guides. Special pause control eliminates usual clicks when starting or stopping. Single knob for tone control. 5-watt amplifier. Distortion less than 1%. Signal-to-noise ratio more than 40 db. Wow and flutter less than 0.5% at 7l/ 2 '7sec. Weight: 38 lbs. Two-speed, dual track monaural portable. Five push- button controls. Two 51/^-inch speakers. Tape speeds: 7'/2 and 1% ips. Recording level guide. Play and Record pushbuttons interlocked to prevent accidental erasures. Fast rewind: 1200 feet in 80 seconds. Distortion less than 1%. Signal-to-noise ratio more than 40 db. Wow and flutter less than .5%. Input for microphone, radio, phonograph or TV. Output jack for external speaker. Dimensions: 10" x 15l/ 2 " x 15J4". Weight 33 lbs. Model 771 is same as above except for stereo playback head. Has three output jacks: for stereo playback through 0763 18 amplifier-speaker, for monaural playback through external speaker, for monaural playback through 076318 amplifier-speaker. A basic tape transport providing almost unlimited flexibil- ity. Three motors. Two speeds: iy 2 and i%. Signal- to-noise ratio is better than 50 db. Flutter less than 0.25%. Distortion less than 1%. Has index counter, power off-on switch, piano-key controls, micro-switch automatic stop. Available in following combinations: T-210: monaural record/playback; T-211: monaural and stereo playback; T-212: monaural record /playback and stereo playback: T-213: monaural record /playback and stereo record/playback; (above models require matching pre-amplifiers): T-216: incorporates Model T-212 with P-100 and RP-120 in portable carrying case. Model 218 stereo recorder incorporates T-213 and 2 RP-120 in portable carrying case. New 3 -motor, dual track portable tape recorder. Two speeds, 7 J/J a "d 3fi- Has positive braking, and piano- key controls. Power output is 5 watts. Tape lifter removes tape from heads during Stop and High Speeds. Wow and flutter is less than 0.25% at 7'/2 ips. Automatic interlock prevents accidental erasure. Original equipment includes microphone, empty 5" reel and full reel of tape. New home stereo system that includes stereo /monaural tape recorder and two matching amplifier-speakers. Tape speeds: 7y 2 and 3% ips. Electro-mechanical keyboard controls. Stereo switch for inline or offset. VU index counter. Three-motor direct drive. Positive braking. Wow and flutter less than 0.2%. Signal-to-noise ratio better than 50 db. Two twin cone 8" wide range speakers. Inputs: two microphone, two radio/phono. Outputs: four 4-, 8-, 16-ohms, high impedance, one AC outlet. Recorder in portable case weighs 52 lbs. New low-cost professional type monaural/stereo play- back recording unit. Has direct-drive hysteresis syn- chronous capstan motor and two torque motors; dynamic braking. Two speeds: 15 and l]/ 2 'P s - Other features are: push button function switches, slot loading, auto- matic tape lift in high speed, three separate heads, two self-contained pre-amplifiers (one converts from record to play for stereo playback), volume level meter, micro- phone and tuner inputs, earphone monitor jack. Wow and flutter is 0.2% at 15 ips. Signal-to-noise is 50 db. Panel size is 19" x 12'/^". TELECTRO- SONIC CORPORATION 35-18 37th St. Long Island City 1, New York TRUVOX LTD. Truvox (U.S.A.) Ltd. 275 Seventh Ave. New York 1, New York VIKING OF MINNEAPOLIS 9600 Aldrich Ave., So. Minneapolis 20, Minn. Model and Price Telectro Model 1980 Stereo Playback Unit $99.95 Telectro Model 300 Stereo Portable $189.95 Model 350 Portable $149.95 Mark IV Tape Deck TR-2106 $199.50 TR-2116 $2 1 5.00 Type "K" Record-Playback Amplifier $109.50 Viking 75 Series Tape Decks Model FF75R-LP. Monaural Record/ Playback $ 78.50 Model FF75RM-LP. Monaural Erase/ Record /Monitor 87.00 Model FF75SR. Monaural Erase/ Record, Stereo Playback 113.00 Model FF75ES. Stereo (In-Line) Erase/ Record and Playback 1 13.00 99.00 Model 85P. Monaural Playback Model 85R. Monaural Record Playback 108.50 Model 85RQ. Monaural Erase/ Record, Stereo Playback 132.50 Model 85SR. Monaural Erase/ Record, Stereo Playback 143.00 Model 85SRO. Monaural Erase/Record, Four-Channel Stereo Playback 167.00 Model 85ES. Monaural-Stereo Erase/ Record; Playback 143.00 Model 85ESQ. Monaural Four-Channel Stereo Erase Record Playback 167.00 RP61 Record Playback Amplifier $ 77.50 RP61VU Record; Playback Amplifier 119.00 PB60 Playback Preamplifier 29.50 Viking Endless Play Cartridge Recorder 35P $60.00 35R $67.00 (other models available by request) Frequency Response 50-15,000 cycles at 7'/, "/see. 50-15,000 cycles at 7Vj"/see. 40-15,000 cycles ( =3 db) at 7'/," 'sec. 30-15,000 cycles ( -2 db) at 7Vj" /sec. 30-15,000 cycles ( -2 db) at 7'/j "/sec. 40-14,000 cycles at 7y,"/sec. 40-7,000 cycles at 33/ 4 "/sec. Data New playback unit for both dual-track and four-track stereo and dual-track monaural. Separate volume and tone controls for each amplifier. Fast Forward and Re- wind. Pilot light indicates when set is in operation. Four- pole motor. Inputs: two for connecting kit that converts any monaural phonograph into stereo disc system. Out- puts: two for external speakers/amplifiers. Signal-to- noise ratio: 45 db. Output is 6 watts peak from each amplifier. Distortion is less than 2.0%. Dimensions: 15" x 8I/2" x HI/2". Weight: 20 lbs. New tape recorder for two- and four-track stereo play- back and monaural record/playback. Speeds: 1]/ 2 , 3% and 1% ips. Pushbutton controls. Digital counter. Auto- matic shut-off. Record and record level indicator. Three- way speaker system. Equalization switch. Inputs: micro- phone, radio/phono/TV. Outputs: two for external speaker /amplifiers. Signal-to-noise ratio: 45 db. Power output: 8 watts peak from each amplifier. Distortion less than 2.0%. Dimensions: 16" x 10" x 14". Weight: 29 lbs. Model 3 50 is monaural. Same as above except for single pre-amp and power amp with push-pull output of 8 watts. Dual track, dual speed. TR-2106 with timing scale. TR-2116 with precision index counter, both fitted with stacked stereo head. With suitable electronics for mon- aural record /playback plus stereo playback or monaural record /playback plus stereo record/playback (half-track erase head requires raw tape). 3 shaded pole B.T.H. motors. Wow and flutter: less than 0.2% at 7J/2 ips. Push button operation, electrical braking, high speed re- wind (45 sec. for 7" reel). Automatic tape lifter. Dimen- sions: 14!4" x 12-13/16" x 5". Weight 14j/ 2 lbs. Component tape deck offered with a wide variety of interchangeable head assemblies. Features flutter-filter belt drive. Wow and flutter 0.2% rms. Front panel speed change, 3% and IVi ips. Split-knob position shift for record/play, fast forward and rewind. For playback, re- quires preamplifier with low level tape input and NAB equalization. For recording, requires Viking RP61 or equivalent matched record/playback amplifier. (Two RP61 amplifiers and stereo deck serve for stereo record- ing). All Viking decks may be modified through addition of heads and brackets to provide same functions as other models listed. Decks accommodate three heads and are also available with the quarter track head configuration. IV/e," x 8%" x 5" deep. 115V., 60 cycles A-C. (50 cycle models also available). Weight 11 lbs. The finest home type tape deck in the Viking line. Flut- ter-filter belt drive. Two motors providing fast forward and rewind. Front panel speed change, 3% and l]/ 2 ips. Dual rotary control. Inner ring selects "fast forward" and "fast rewind." Outer knob selects normal forward, stop and cue (edit). Footage counter. Space for five heads. Pressure pads provided at three head positions. Tape- lifters remove tape from heads except in play and "cue" positions. Short-gap record /playback heads. Ultra-short gap quarter-track in-line head for the new i% ips tapes are available. See "Q" models. Signal-to-noise ratio 50 db. Wow and flutter 0.2 percent or less rms. Use with RP61 Record /Playback amplifiers for recording. Use PB60 preamplifier or amplifier having equivalent (NAB) tape equalization. Tapes recorded on Viking may be played back on any machine having standard NAB equalization. 1 lOv, 60 cycles. (50 cycle models available.) (All 85 Series Viking decks are flexible in that heads may be added to provide special functions such as sound- on-sound recording, stereo monitoring, language teach- ing, etc.) Dimensions: 9Y 2 " x 13" x 5". Weight 12 lbs. RP61 record/playback amplifier matches all Series 75 and 85 tape decks above. PP61VU is the same as the RP61 but has a VU meter instead of "Magic eye." Portable handler for use with Fidelipac continuous loop tape cartridges holding up to 1600 feet of tape. Single lever control. Speed change control for 3% or 7'/8 ips tape speeds. 115v, 60 cycle A-C motor (50 cycle motor available). Accommodates one or two PB60 Pre-ampli- fiers, or PA62 combination preamp-amplifier, or RP61 Record /Playback Amplifier. 10'/ 2 " * 9%" x V/ 4 " mounted in case. Weight 5 lbs. Model 3 5P is monaural half-track playback only, mounted in case. Model 3 5R is monaural half-track rec- ord/plavback/erase, mounted in case. 18 AUDIO RECORD October, 1958 Manufacturer SYMPHONIC RADIO & ELECTRONIC CORP. 10 Columbus Circle New York 19, New York TANDBERG OF AMERICA, INC. 10 E. 52nd St. New York, N. Y. Model and Price Model 300 Stereo Re- corder and Speaker $249.95 Frequency Response 80-12,000 cycles at 7 V, 7 sec. Model 2 $249.50 Model 3B $299.50 Model 3BF $349.50 Model 2F $299.50 Model 3-STEREO $369.50 TELECTRO INDUSTRIES CORP. 35-16 37th St. Long Island City 1, New York TELECTRO- SONIC CORPORATION 35-18 37th St. Long Island City 1, New York Model 3 STEREO-4T $379.50 Model 4-STEREO $349.50 Model 5-STEREO $399.50 Telectro Model 938 Price on Request Telectro 14" Tape Transport Price on Request Telectro Model 1970 $99.95 Telectro Model 1960 $79.95 30-10,000 cycles at 3 3/ 4 7 sec. 30-6,500 cycles at 1 V 8 "/sec. Data New tape recorder and speaker combination for stereo playback, monaural record/playback. Speeds: 7^2 ar >d 3 54 ips. Two speakers in recorder. Push button controls. Tape index timer. Recording level indicators. Automatic end-of-reel shutoff. Monitor switch. Pause button. Safety switch prevents accidental erase. Output: J watts undis- torted, 5 watts peak. Wow and flutter: less than 0.4% RMS. Input: microphone and radio/TV/phono. Out- puts: two for external speakers. Dimensions: 10" x \^V 2 " x 15". Weight: 36 lbs. Portable, dual-track recorder with speeds of V/i and 3% ip s - Precision Laminar Heads, Microphone, radio/ phono inputs; DAMPED Electronic eye recording indi- cator, clock-type counter, Goodman 5J/2" x 8" speaker. Wow and flutter below .2% at 3% ips, .25% at 1% ips. Signal-to-noise ratio: 57 db at 324 'P s - 3.5 watts out- put, distortion under 1%. 30-20,000 cycles at 7 1/, 7 sec. 30-12,000 cycles at 3% "/sec. 30-6,500 cycles at 17, "/sec. 30-10,000 cycles (-2 db) at 7'/, 7 sec. 30-15,000 cycles (±2 db) at 7V, "/sec. Flat to about 8,500 cycles at 7 V, "/sec. 100-10,000 cycles at 7i/j" sec. Model 3B is the same as Model 2, except 3 speeds (1% ips, 3% ips and 7'/2 ips) and improved performance. NARTB Equalization, Wow and flutter below 0.1% at 7J/2 ips, Signal-to-noise ratio: 60 db at 1\/ 2 "/sec. Auto- matic tape stop and BASS switch feature. Frequency response: 30 to 17,000 cycles at 7J/2 ips. Models 3BF and 2F are solenoid operated versions of Model 3 and Model 2, same specifications, functions, except operates remotely thru a supplied foot pedal. Model 3 -Stereo is the same as Model 3B, except it has a stereo head and two power playback amplifiers built-in for playback of stereo tapes. Model 3-Stereo-4T is the same as Model 3 -Stereo except it has Four-Track Stereo head to playback four track monaural and new 3% ips. Stereo twin tracks. Model 4-Stereo is the same as Model 3B, except it is 4- track monaural record-playback and stereo twin track playback, one stereo power amplifier and second channel stereo preamplifier built-in (requires one external power amplifier for stereo playback); dual track erase. Model 5 -Stereo has four-track record /playback, stereo twin track playback, two power amplifiers built-in, sep- arate gain controls for each channel. Same specifications as Model 3-Stereo-4T. Accommodates #241 Stereo Re- cording Amplifier to record stereo. Professional-type recorder for portable or rack mounting. Also available in console cabinet. Plug-in head assembly — single or dual track. Two speeds — 7 , /^"/sec. and 15"/sec. Wow and flutter, less than 0.2% at lYz'/sec, less than 0.15% at 15"/sec. Distortion, less than 0.2% RMS at maximum recording level. Signal-to-noise, over 55 db at both speeds. VU meter. Adjustable bias. Micro- phone, bridge and line inputs. Outputs, 600 ohms bal- anced; monitor jacks for power amplifier and headset. Fast forward and rewind, less than 1 min. Playback tim- ing accuracy, better than 0.2%. Professional tape transport for rack or portable-case mounting. Constant-speed hysteresis synchronous motor drive, with torque motors for supply and take-up reels. Speeds, 7\/ 2 " and 15"/sec. Starting time, less than 0.1 sec. Stopping time, less than 2" at 15"/ sec. Timing ac- curacy, better than 0.2%. Fast forward and rewind, less than 1 min. for 14" reel. Wow and flutter, less than 0.15% at 15"/sec. Plug-in head assembly — 3 heads single or dual track. Push-button relay operation, editing knobs, automatic shut-off. Solenoid brakes. Model 1960. Portable, dual track recorder with 3%" and 7J/2" tape speeds. Push-button speed control and single knob control for record and playback. Neon record-level indicator. Built-in 6" speaker. Patch cord available for direct recording from radio-phono. Weight, 15 lbs. Model 1970. New two speed tape recorder. Speeds: 7'/2 and 3% >P S - Single-knob function control for Record and Play. Fast Forward-Rewind switch. Interlock prevents accidental erase. Two speakers. Output: 5 watts peak. Input: microphone, radio, TV, phono. Output: external speaker. Dimensions: 15" x 8" x HI/2". Weight: 19 lbs. Manufacturer BROADCAST EQUIPMENT SPECIALTIES CORP. P.O. Box 149 Beacon, N. Y. CAPITAL RECORDS, INC. Hollywood and Vine Hollywood 28, California COLUMBIA RECORDS, INC. 799 Seventh Avenue, New York 19, N. Y. De JUR AMSCO CORP. 45-01 Northern Blvd., Long Island City 1, N. Y. DELMONICO INTER- NATIONAL 42-24 Orchard St. Long Island City, New York Model and Price Tapak (tape-pack) Duplex Musicale $389.25 Duplex Newscaster $349.50 Triplex Musicale $438.75 Triplex Newscaster $399.75 Simplex Newscaster $289.50 Pocketape $349.50 Frequency Response 100-9,000 cycles at 71/T/sec. as above as above Data The spring-powered equivalent of conventional electric tape recorders featuring the new Gyro Drive mechanical wow and flutter filter for recording serious music. Re- cords, erases, monitors, rewinds at high speed, plays back through built-in 4" x 6" loudspeaker, or will feed an external amplifier or public address system. Has unitized amplifier with transistorized AC bias oscillator for low battery drain and extended frequency range. Speed 7I/2" per second. Range 55-58 db. Newscaster is same as Duplex Musicale without Gyro Drive. Speed l\/ 2 " per second (3J4" optional). Same as Duplex Musicale with the addition of a VU meter and 600 ohm output. Serves as a line preampli- fier for microphone, or plays back tapes to line at zero level. Speed 7'/2" per second. Range 5 5-58 db. as above 100-6,000 cycles at 7 y, 7 sec. 150-6,000 cycles at 7 1/, "/sec. 150-4,000 cycles at 3 % "/sec. 1 50-3,000 cycles at l%'7sec. Model 850 Stereo Portable $249.95 Portable Stereo Recorder Model 570 $249.95 Portable Stereo Recorder Model 575 $329.95 Stenorette Dictating and Transcribing Machine $179.50 Saja MK-5 Portable Recorder $129.95 80-12,000 cycles (±5 db) at 71/, "/sec. 60-12,000 cycles at 7 y, 7 sec. 50-14,000 cycles at 7 y, 7 sec. ample for voice communication 50-16,000 cycles at 7i/ 2 "/sec. Newscaster is same as Triplex Musicale without Gyro Drive. Speed iy 2 " per second (3%" optional). The budget Tapak for general use. Records, rewinds at high speed, crystal microphone doubles as listening device, feeds external amplifier or phonograph input of radio for speaker reproduction. Recording characteristics for NARTB on studio equipment or home recorders. Speed 7J/2" per second (3J4" optional). Range 35-40 db. Pocket-size compatible subminiature transistor tape recorder-reproducer. "Investigator" model records at changeable speeds of l 7 /$ or 1% ips on dual tracks total- ing 2 hours or 1 hour respectively on 600' of J/4" tape. "Broadcaster" model records 90-mil track at 7*/2 ips for 15 continuous minutes. Erases, records, rewinds instantly and plays back. Interlocks prevent mistakes. Microphone doubles as listening device. Signal-to-noise ratio: 50 db. Motion at 7J/2 ips suitable for music. Twelve hour motor batteries. Size: V/ 2 " x 4 l / 2 " x 6%". Weight: 2 lbs. New portable tape recorder complete with two external speakers. Records monaurally, plays back monaural and stereo tapes. Speeds: 7]/ 2 and 3% ips. Push-button con- trols. Stereo balance and hum balance adjustments. Monitor switch, tape runout switch and recording safety lock. Wow and flutter is less than .3%. Signal-to-noise ratio is 42 db. Peak power output: 5 watts/channel. Two external speaker outputs; two inputs for radio-phono and microphone. Dimensions: 15J/2" x HYs" x 9|/g". Weight: 42 lbs. Complete portable stereophonic playback and monaural recorder with in-line heads. Consists of two matching units, one containing two amplifiers and one set of speak- ers and the other containing one set of speakers and storage space for tapes. Push-button control with neon level indicators for recording. Each amplifier capable of 3 watts undistorted, for a total of 6 watts of output. Contains two 7" oval speakers and two 4" tweeters. Tape index counter, balancing control and automatic shut-off after completion of tape. Microphone and balancing tape provided with each unit. Cases covered with saddle stitched, washable vinyl. Amplifiers have total output of 1 5 watts. Contains two 8" speakers and two 4" tweeters. Cases are covered with Neolite. Otherwise same as above. A dictating transcribing machine that uses "Mylar" magnetic tape. Push-button controls. Duplicate set of controls on microphone/speaker for start, stop, auto- matic review, electronic erase and correction. Functions perfectly in a moving car (with transformer). Has built-in conference setting for recording groups. Recording time — 30 minutes per reel. Transcription accessories — foot pedal control or typewriter control — features remote control backspacer for quick review. Dimensions: 11 Yl x 9Y 2 x 41/2. Weight: 12 lbs. New two-speed West German portable recorder. Speeds are 7J/2 and 3% ips. Two speakers. Illuminated function indicators. Single knob control. Double effect button for recording over a recording. Automatic end-of-tape shut- off. Magic eye record level indicator. Pause control for record and playback. Lock prevents accidental erase. Dimensions: 15%" x \2%" x 7". Weight: 40 lbs. AUDIO RECORD October, 1958 17 Manufacturer DICTAPHONE CORPORATION 420 Lexington Avenue New York 17, N. Y. ELECTRONIC APPLICATIONS 194 Richmond Hill Avenue Stamford, Conn. Model and Price Dictet Portable Recorder $294.00 Dictatape Continuous Recorder $3200.00 ReVox C36-2K Monaural Portable $349.00 Model C-362S Stereo Portable $399.00 Frequency Response 200-4,000 cycles 300-2,700 cycles (±3 db) at l%7sec. NAGRA III B, C, E (Prices depending on model) $600.00 to $850.00 ELECTRONIC TEACHING LABORA- TORIES, INC. 1818 M St., N. W. Washington 6, D. C. FAMOUS MODEL CO., INC. Melbourne, Fla. MONITOR 2-Channel Portable Model E-3 $297.08 Model E-3C Console $280.07 Model E-3CS Console $273.05 MONITORET 2-Channel Recorder Model E-4 $247.00 Privateer Mark VIM $379.00 40-12,000 cycles { + 1— 2db) 15,000 —3 db max. at 7y 2 "/sec. 50-8,000 cycles at 3% "/sec. 30-15,000 cycles (±2 db) at 15 "/sec. 40-12,000 cycles (±2 db) at 7 '/ 2 7 sec. 50-8,000 cycles at 3% "/sec. Data Miniature, dual-track, magazine loaded, magnesium case tape recorder. Powered by two 7'volt mercury batteries for motor, and separate battery for transistor amplifier. Battery life: 20 hours for motor, 40 for amplifier. Battery life indicators. Magazine has self-adjusting spindles; automatic stop at end of reel. Records at 2J/2 ips; 30 minutes recording time on each side of magazine. Wow and flutter: 2.25%. Signal-to-noise: 45 db. Magnetic microphone is both microphone and monitor speaker. Motor operates only when mike is plugged in. Dimen- sions: 2' x 4I/2" x 6J4". Weight: 2 lbs. 11 oz. Multi-channel recorder that permits simultaneous record- ing of four separate signals on a standard J4" magnetic tape. Up to 16 hours continuous unattended recording. Speed: V/i ips. Instant start and stop. Six motors. Sep- arate reproduce heads and amplifier provide playback on either unit while recording. Automatic safeguards pre- vent accidental erase. Harmonic distortion: 5% or less at 1,000 cps. Flutter: 1%. Fast forward and rewind. Single or dual track models; two speeds 3^4 and 7 J/J ips, portable; three motors; separate recording and playback amplifiers; wow and flutter at 7 J/J ips .15-. 20% max.; signal to noise 50 db or better at normal levels; 3.5-watt amplifier; 8" coaxial speaker; push button operation; tuning eye recording level indicator; tape counter; end- of-tape switch-off; connections for external speaker, am- plifier, or remote control; up to 10" reels; dimensions: 18J/J," x ll^e" x 13%"; weight: 46 lbs. Model C-36 2S is same as above plus stereo playback; equalized outputs from both channels; cathode followers; no speakers contained. Portable, professional, completely transistorized unit, available as model B with three speeds (3%, 7J/J and 1 5 ips) and as model E at 7 J/J ips. Type B and E contain three heads, model III C has two heads. Speed constancy 0.2% or better; wow and flutter 0.1% at 15 ips or 0.2% at 7J/J ips; signal to noise 55 db or better; meter for battery condition and level; outputs 3 volts at 600 ohms balanced; self-contained monitor speaker; "speech" filter built in; all normal mike inputs plus 2 line mixers; motor speed servo-controlled; operates from any 12 volt source or self-contained batteries. Accessories available. Prices depending on model: $600.00 to $850.00. 50-9,000 cycles (±3 db) at 3%"/sec. as above to 3,500 cycles at l%"/*ec. Professional language laboratory recorder, dual track, unique "split" amplifier performs simultaneous playback and recording function on separate tracks, distinctive in aural/oral laboratory work. Selector switch modes for listen/record, dual playback, master record, master play, duplicate. Volume level meter, separate record /play heads with azimuth adjustment, bias 60KC, signal to noise 45 db or over at 3% harmonic distortion. Model E-3C for console mounting, all components mounted on Yh" aluminum panel, size 19 x 11 x 5%, weight 15 lbs. Special feature: multiple installations have remote con- trol tape duplication facility. Model E-3CS is same as Model E-3C except for omission of master record and master play selector switch modes. Language laboratory recorder, dual parallel tracks, a "stripped-down" version of Monitor E-3 with same characteristics except only two selector switch modes for listen/ record and dual playback. Model E-4C for console mounting. Portable dual track tape recorder, self-contained recharge- able batteries. Rewind electric. No batteries to replace. Battery charger separate unit but included in price. Units may be operated in covert fashion in briefcase from external concealed switch and making use of external concealed microphone. Available accessories include in- put level indicator, headset, external microphone, tele- phone recording adaptor. Manufacturer REVERE CAMERA COMPANY 320 East 21st St. Chicago 16,111. Model and Price Model T-100 $169.50 Model TR-200 (with radio) $224.50 Model T-500 $179.50 Model TR-600 (with radio) $234.50 Model T- 11 $284.50 ROBERTS ELECTRONICS, INC. 1028 N. LaBrea Avenue Hollywood 38, Calif. THE STANCIL- HOFFMAN CORP. 921 North Highland Ave. Hollywood 38, Calif. SUPERSCOPE, INC. 8520 Tujunga Avenue Sun Valley, Calif. Model 90 Monaural Recorder $299.50 Model 90-S Stereo Recorder $325.50 Model A -901 Stereo Amplifier $149.50 Minitape Recorder $494.00 SYLVANIA ELECTRIC PRODUCTS, INC. Radio & Television Division 700 Ellicott Street Batavia, N. Y. SYMPHONIC RADIO & ELECTRONIC CORP. 10 Columbus Circle New York 19, New York Sterecorder Model 555-A Stereo Recorder $595 Model DK 555-A Stereo Recorder $525 Model CSS-555-A Stereo System $775 Model PSC-2 1 2 Stereo Speaker System $ 1 89 Frequency Response 85-7,500 cycles ( ±3 db) at 3% "/sec. 100-5,000 cycles ( 3 db) at l%"/ioc. Data Portable, dual-track recorder available in either 1% or 3% ips. tape speed. Signal-to-noise ratio, over 45 db at either speed. Distortion, less than 1.5%. Rewind and rapid forward: single knob control. Flutter less than 0.3%. Two level recording indicator. 5" x 7" Alnico V speaker. Weight, 25 lbs. 40-16,000 cycles (±3db) at 7'/, "/sec. 40-15,000 cycles (±3db) «"* 7'/ 2 "/see. 40-7,500 cycles (±3 db) at 3 3/4 "/sec. flat to 10,000 cycles at 7y 2 "/sec. flat to 5,000 cycles at 3% "/sec. flat to 4,000 cycles at iy 8 "/sec. Model 4901 Portable Recorder $199.95 Symphonic Model 210 $149.95 30-16,000 cycles at 7yi "/sec. at 7y J "/sec. 50-12,000 cycles cycles (±2 db) at 7 '/ 2 7 sec. 30-10,000 cycles at 3% "/sec. High fidelity 10J/J" reel tape recorder for professional use and custom installations. Guaranteed specifications, signal-to-noise, over 50 db, wow and flutter less than 0.2%. Features: One volt cathode follower pre-amplifier output. Monitor amplifier with 2J/J watt output. Adjust- able 70 Kc bias-erase oscillator with indicator. Less than J/J-second start and stop. Automatic head demagnetizing. Precision revolution tape counter. Electrical remote with automatic drive roller release. Portable two-speed recorder with hysteresis synchronous one-motor drive. Locking device prevents accidental erasure. Digital index counter. Wow and flutter, 0.15%. Signal-to-noise: 45 db. Wrap-around tape threading, illuminated VU meter, low and high level inputs. Ex- ternal output jack. Five-watt amplifier; 5" x 7" extended range speaker. Dimensions: 16 x 14j/Jx9. Weight, 28 lbs. Model 90-S has same specifications as above except for following. Has stereo record /playback head. Frequency response is ±2 db within the same limits. Has jacks for low level, high impedance microphone input; high level line input; auxiliary speaker or line output; input/output/ jacks for each record/play head 2 channels. New version of the Minitape available at single tape speeds of V/$, 3%, or 7J/J ips. Operates completely en- closed. External pushbutton for start or stop. Warning light for end of tape. Takes 5" reels, records up to two hours continuously. Battery-operated. Automatic volume control over a 40 db range. Does not contain amplifier/ speaker. External amplifier/speaker and other accessories available. Dimensions of the Minitape: 9" x 12" x 5". Weight, including battery: 13 lbs. 100-8,500 cycles at 7 y, 7 sec. 80-12,000 cycles at 7y,"/sec. Portable stereo recording and playback system. Two built-in pre-amp channels, 8 watts power peak per chan- nel. Hysteresis synchronous drive motor utilizing ad- vanced rim drive principle on dynamically balanced flywheel. Two VU meters. Two high-impedance inputs for microphones. Two high-impedance inputs for AM/ FM tuners or stereo dubbing. Two low-impedance cathode follower pre-amp outputs. Two speaker outputs. Binaural/monaural headphone monitor output. In tan- taneous stop lever coupled to complete editing and cue- ing facilities. Flutter and wow less than 0.2% at 7J/J ips. Signal-to-noise ratio 50 db per channel. Dimensions: 19x16x11". Model DK-555-A is the same as Model 55 5-A without portable case, microphones or monitor speaker. Model CSS-555-A consists of Model 555-A and Model PSC-212. All series of the Model 555-A are available with 4-track stereo reproducing head at an addi- tional $75.00. New dual speed monaural portable. Speeds: 7J/J and 3 24 ips. Four knob controls. Single wind and rewind knob. Edit button. Recording level meter. Two speakers. Illuminated dial indicates when amplifier is on. Record- ing time indicator. Undistorted 2 watts peak. Signal-to- noise ratio, 3.3 watts. Wow and flutter, 40 db. Output for external speaker. Input for microphone and phono- graph. Dimensions: 8" x 18" x 16". Weight: 30 lbs. Portable dual-track recorder, 3J4" and 7J/J7sec, with push-button control, "normal" and "distort" recording level indicator and index timer. Wow and flutter, less than 0.4% RMS. Power output, 3 watts undistorted, 5 watts peak. Two speakers — 5" x 7" woofer and 3.5" tweeter. Inputs for microphone and radio-phono. Out- puts for external speaker and external amplifier. PA system use. Includes crystal mike. Weight, 35 lbs. 16 AUDIO RECORD October, 1958 Manufacturer REED RESEARCH INC. 1048 Potomac St., N.W. Washington 7, D. C. Model and Price Transcriber Model K-3 $1,100 Educorder Dual Model M-6A $335.00 REVERE CAMERA COMPANY 320 East 21st St. Chicago 16, III. Model T-202 Monaural Portable $207.50 Model T-204 Stereo Portable $237.50 Frequency Response depends on tape speed 70-7,500 cycles at 7% "I ft. 70-5,000 cycles at 3% "/see. Model T-700D $225.00 Model TR-800D $275.00 Model T-700 $235.00 Model TR-800 $287.50 Model T-10 $245.00 Model TR-20 $297.50 Model T-700 B&M $245.00 Model TR-800 B&M (with radio) $297.50 Model T-10 B&M $255.00 Model TR-20 B&M (with radio) $307.50 Model T- 11 00 $169.50 Model TR-1200 (with radio) $219.50 Model T-1120 Stereo $199.50 Model T-900 $199.50 Model TR-1000 (with radio) $224.50 40-15,000 cycles (±3 db) at 7 y, 7 sec. 40-8,000 cycles (±3 db) at 3% "/sec. 40-14,500 cycles ( ±3 db) at 7 y, 7 see. 40-7,500 cycles (±3 db) at 3 % "/sec. 80-8,000 cycles (±3 db) at 3 V 4 "/sec. 60-15,000 cycles ( 3 db) at 7'/, "/sec. as above 75-12,000 cycles (±3 db) at 7y,7sec. 85-7,000 cycles ( ±3 db) at 3 % "/sec. 85-7,500 cycles ( =3 db) at 3 % "/see. Data Manufacturer A new concept in magnetic tape transcribing equipment. Tape speed is continuously variable between two tenths and thirty ips. Can playback any Ya" magnetic tape re- corded on American or European tape recorders. Pas- sages may be rapidly scanned or slowed down by flicking a switch which doubles or halves the selected speed. Auto- matic back-spacing. Single channel, in-line or staggered binaural tapes can be played. Foot pedal control for stopping, starting and rewinding tape. Signal-to-noise ratio is better than 40 db. Wow and flutter is less than 0.5%. Weight, 46 lbs. Dimensions: 14" x 19" x ^Y 4 ". Portable, two speed, two channel recorder with single knob-control tape mechanism. Two separate record/re- produce amplifiers and two separate record-play-erase heads. Records or plays back both channels simultane- ously or records on one while playing back the other. Monitoring by headphones while recording. Signal-to- noise, 40 db. Wow and flutter, 0.3% at 7!/ 2 "/sec. Fast forward and rewind, 70 sec. for 1200 ft. Nominal 75 watt peak power from each channel. Two input connec- tions. Three output connections: Channel 1, Channel 2 and Dual for binaural headphones. Includes headphones and microphone. Weight 30 lbs. New two speed portable recorder. Speeds: 7'/2 and 3J4 ips. Two matched speakers with cross-over network. Key- board control. Automatic safety lock and warning light to prevent accidental erase. Two-level record indicators. Index counter. Automatic stop on tape runout. Appli- ance power outlet. Drop-in loading head slot. Wow and flutter less than 0.3%. Signal-to-noise ratio greater than 48 db. Model T-204 is the same as Model T-202 except for the addition of stereo playback. Portable dual track recorder available with either single or dual speed. Convenient keyboard control, electrical solenoid operated. Signal-to-noise ratio over 48 db on dual speed machines and 50 db on single. Distortion less than 65% on normal levels. Rewind and fast forward speed, 170 ips. Flutter and wow less than 0.3%. Two neon lamps for accurate level setting. Precision revolution index counter, for instant location of recording. Can be op- erated as a PA system. Provisions for electrical remote controls. Models TR-800D, AM tuner. TR-800 and TR-20 have built-in Table models (as above) in solid blonde oak or solid Honduras mahogany. Special pressure relief port for ex- tended frequency range. Portable dual track recorder available with either single (3% >P S ) or dual (3j^-7'/2 ips.) speed. Signal-to-noise ratio over 48 db on either machine. Distortion less than 1% at normal levels. Rewind and fast forward, 170 ips. Flutter less than 0.3%. Single knob control automatically returns to stop when power is turned off. Dual level indi- cator. Revolution index counter. Instant stop button. Two-speed knob can be changed while in any function. Rugged fiberglass case. Two speakers. Can be operated as a public address system. Weight, 28 lbs. FAMOUS MODEL CO., INC. Melbourne, Fla. FEN-TONE CORP. 106 Fifth Ave., New York 11, N. Y. FERROGRAPH RECORDER CO., LTD. Sole U.S. Agents ERCONA CORP. 16 W. 46 St. New York 36, N. Y. FILNOR PRODUCTS, INC. 1 Park Avenue New York 16, N. Y. Model and Price 777 Series Battery Portables Tapo Model 777 (blue) $295.00 Traveler Model 777-1 (brown) 298.50 Tempo Model 777-2 (gray) 314.00 Mark IV (monaural) $144.47 Fen-Tone Brenell Mark IV Tape Deck Mark IV B (stereo) $182.87 Custom Installation Model 66 /N (33/4-71/, ips) $399.50 Model 66 /H (7i/,-15 ips) $425.00 Portable Model 3A/N Model 3A/NH (33/4.71/, ips) (7i/j-15 ips) $379.50 $425.00 Stereo Model 35/ N (33/4.71/, ips) $475.00 Stereo Model 3S/H (7i/,-15 ips) $520.00 Stere-ad" Unit $195.00 Model 88 Stereo record and playback $595.00 E.M.I. Battery Portable $395.00 Model L2A (33/4 ips) Model L2B {7i/, ips) Model L2C (15 ips) Teltape Recorder $29.95 Frequency Response to cps 3,500 - l'/s'/sec. 6,000 - 3 s/, "/sec. 12,000 - 7y, "/sec. 30-15,000 cycles (±3 db) at 15" /sec. 50-12,000 cycles ( 3 db) at 71/, "/sec. 50-6,500 cycles ( ±3 db) at 3 3/, "/sec. 40-15,000 cycles (±2 db) at 15" /sec. 50-10,000 cycles (±2 db) at 7V, "/sec. Data Portable dual track tape recorders with completely self- contained battery powered tape transport, amplifier and speaker for playback. Rechargeable battery cycle up to eight hours depending on tape speed. Has self-contained battery recharger. May be operated on 110 AC. Rewind is electric: speed 10 to 1. Maximum reel size, 5". May be operated with door open or closed. Monitors while recording. Inputs for microphone and headphone moni- toring. Crystal or ceramic microphone included. Acces- sories include snap-on retractable legs, canvas carrying case and shoulder strap. Weight 21 lbs. Size 6" x 10" x 15". Three-speed tape decks for monaural and stereophonic record/playback, with three-motor drive. All mount up to four heads with individual azimuth adjustment. Cap- stan-sleeve speed change. Dual half-track operation for up to 7" reels. Two-knob control, fully interlocked. Wow and flutter, less than 0.2%. Fast forward and rewind, 45 sec. for 1200 ft. Monaural deck can be converted to stereo or sound-on-sound recording by installing addi- tional heads. Can be used with PRO-2 amplifier. as above 40-15,000 cycles (±2 db) at 15" /sec. 50-10,000 cycles (±2 db) at 7V, "/sec. 50-7,000 cycles (±2 db) at 15 7 sec. 50-5,000 cycles (±2 db) at 7V, "/sec. 50-2,500 cycles (±2 db) at 3 3/4 "/sec. to 4,000 cycles Dual-speed, dual-track recorders for portable or custom installation, manufactured by British Ferrograph Re- corder Co., Ltd. of London. Accommodates up to 8'/4" reels. Signal-to-noise ratio, better than 50 db, 200-12,000 cps; 45 db unweighted (including hum). Wow and flut- ter less than 0.2% at 7 , / ^"/sec. Longterm speed stability, better than 0.5%. Erase and Bias frequency, 53,000 cps. Inputs: Two; 1 megohm and 0.1 megohm respectively. Outputs: Two; 0.75 volts at 0.1 megohm for external amplifier; 15 ohms at 2'/2 watts (undistorted). 3 motors including hysteresis synchronous drive. "Ferrodexer" counter, clock type with zero setting, factory installed $20.00 additional. Master control switch for permanent inputs and outputs. Weight: 45 lb. Model 3S — data on this model identical with 3 A Series above except for addition of stereo playback. Signals from stacked stereo head may be fed into external dual amplifiers via an equalization chain for each section or to a "Stere-ad" unit which provides all power output for stereo replay requiring only a suitable speaker system. Weights: Model 3S: 49% lb. "Stere-ad" unit: 12"/ 2 lb. Portable recorder for stereo recording and playback manufactured by British Ferrograph Recorder Co., Ltd. of London. Signal-to-noise ratio, better than 50 db, 200- 12,000 cps; 45 db unweighted (including hum). Wow and flutter, less than 0.2% at 7l/2"/sec. Longterm speed stability, better than 0.5%. Erase and bias frequency, 53,000 cps. Accommodates up to %Ya" reels. Twin recording amplifiers and twin replay preamps terminating at 3 milliwatts across 600 ohms (balanced). Switched VU level meter provides proper recording levels for each track which is served by dual inputs ( 1 megohm and 0.1 megohm 0.003 V peak and 0.1 V peak respec- tively). "Ferrodexer" counter, clock type with zero set- ting, factory installed $20.00 additional. Weight: 48 lb. Battery-operated recorder manufactured by Electrical H Musical Industries, Ltd. of England. Accommodates 5" reels and requires no external power source. Signal-to- noise, better than 45 db unweighted, when replayed on high quality studio equipment. Wow, less than 0.2% at 15"/sec, 0.25% at 7'/ 2 7sec. and 0.3% at 3%"/sec. Separate recording and playback heads and amplifiers for monitoring and instantaneous playback. VU meter for recording level. Manually operated geared rewind device to conserve battery life. Operates with cover closed. Weight, 141/2 lb. complete. Transistorized portable recorder with variable speed con- trol. Operates on four type C flashlight batteries. Plays for 16 minutes with 3" reel containing 300 feet of Ya" magnetic tape. Erase head can be swung out of the way so that erase is optional. Instant braking, fast rewind, automatic slack take-up. Plays back through headset fur- nished with recorder. Weight: 2 lbs. 10 41 DIG RECORD October, 1958 Manufacturer GBC AMERICA CORP. 243 Broadway New York 7, N. Y. INTERNA- TIONAL RADIO AND ELECTRONICS CORPORATION South 17th St. & Mishawoka Rd. Elkhart, Ind. Model and Price GBC PT/12 Recorder $169.50 Crown Prince Dual Track $395.00 With In-Line Stereo Playback Added $480.00 *?* £*£& 0! Crown Imperial Dual Track $495.00 With In-Line Stereo Playback Added $580.00 Crown Broadcaster $435.00 Crown-O-Matic $495.00 Q Crown Royal $845. Less Case Frequency Response 75-7,500 cycles at 3% "/see. 20-30,000 cycles (±2 db) at 15 "/sec. 20-20,000 cycles (32 db) at 7>/j"/ sec. 20-10,000 cycles (=3 db) at 3% "'sec. as above as above 20-20,000 cycles (=2 db) at 7i/j"/sec. 20-10,000 cycles ( 3 db) at 3 3/ 4 "/sec. Data New dual track, dual speed Italian portable recorder. Speeds: 3% and 1%. "Picture" push buttons for fast rewind, playback, stop, record, fast forward. Magic eye volume indicator. Built-in loudspeaker. Undistorted power output: 2'/2 watts. 80 minutes maximum record- ing time. Size in case: ">Y 2 x 10 x 11. Weight: 12 lbs. All "Crown" series models have the following specifi- cations: wow and flutter: .07% at 15 ips, .09% at 7}/ 2 ips, .20% at 3^4 >ps; Signal-to-noise ratio: 57 db at 15 ips, 54 db at iy 2 ips, 44 db at 3% ips; Micro-Sync- Timing: 99.5% playing measured tape, 99.8% record- playback, synchronous motor, 99.75% shaded pole motor. They have: electro-magnetic brakes, "micro- linear" heads, cathode follower out, straight line thread- ing, fast forward and rewind, reel locks, three speeds, white light for playback, red light for record. Crown Prince is rack-panel mounted unit measuring 19" x 14". Uses IOJ/2" reels. Safety record light and lock. High impedance microphone and phono input. Case optional. Portable. Half-track heads standard. See "Crown" specifications above. Has 20 watt built-in amplifier. Two microphones and one phono high impe- dance input. 4-8-16 ohm output. Cathode follower out. Uses lOf/2" reels. Portable. Same as Crown Imperial except that it can use only up to 7I/2" reels. See "Crown" specifications above. Two-speed (7J/j ips and 3^4 >P S ) unit for rack mounting. Has forced air cooling. Playback preamp. Cathode follower output. Plays sixteen hours without repeating on 14" reels at 3% ips. Playback only. "New" Gold Crown Series Gold Crown Prince $425.00 With Stereo Playback Added $475.00 □ '©©:©© Gold Crown Imperial $520.00 With Stereo Playback Added $570.00 Gold Crown Broadcaster $509.00 Stereo-X $695.00 Q *©©;©• Q •©©»©© Gold Crown Royal $865.00 20-30,000 cycles (=2 db) at IS"/ sec 20-20,000 cycles (±2 db) at 7'/," /sec. 20-10,000 cycles (=3 db) at 3% "/sec. as above as above as above as above as above See "Crown" specifications above. The Crown Royal is a complete stereo recorder which records full or half track. Four microphone inputs and two 20-watt Hi-Fi output amplifiers. Heads are in line. Takes up to lO'/^" reels. Portable. See "Crown" specfications above. Plug-in heads. Ano- dized aluminum construction. Constructed for rack and panel mounting. Modular design so units may be added to units. Engraved panels. Records and plays half-track monaural. Plays stereo to two cathode follower outputs. Gold Crown Prince plus an outboard power output am- plifier. Records and plays monaural with 20 watt output. For broadcast station use. Records and plays full-track with full width heads and synchronous motor. See "Crown" specifications above. Records and plays stereo. Plug-in two or four track heads. Four micro- phone inputs. Two cathode follower outputs. All alumi- num construction. The Stereo-X, plus two-50 watt "micro-linear" output amplifiers. 15 Manufacturer PREMIER ELECTRONIC LABORATORIES 382 Lafayette St. New York 3, N. Y. PRESTO RECORDING CORPORATION P. O. Box 500 Paramus, New Jersey Model and Price "Tapesonic" Model 70-C $398.75 Stereophonic Model 70-C B.L. $446.75 Frequency Response Model PB-17C Tape Reproducing Mechanism $785.50 Model A-909 Pre-amplifier $132.00 Continuous Tape Reproducing Console $1,118.75 RADIO CORPORATION OF AMERICA RCA Victor Division Camden 2, N.J. RANGERTONE INC. 73 Winthrop St. Newark 4, N. J. 800 Series Tape Recorder with Amplifier Monaural Rack Mtg. $1375.00 Portable $1480.00 Console $1649.00 Stereo Rack Mtg. $1780.00 Portable $1930.00 Console $2094.00 Transport only $993.00 The Senator Model 8TR2 $179.95 30-18,000 cycles ( -3 db) at 15" sec. 30-15,000 cycles (=3 db) at 71/2 "/sec. 30-7,500 cycles ( 3 db) at 3 V 4 " sec. Data Portable professional type three-speed dual track re- corder. Three motors, including hysteresis synchronous drive motor. 4]/ 2 " VU meter. Push button operation using seven relays and one solenoid. Three separate heads, permitting instantaneous monitoring from tape while recording. A.B. switch permits comparison between original and recorded program. Flutter and wow 0.1%. Mixing channels for mike, radio or phono inputs. Full protection against accidental erase. Bass and treble con- trols with flat response setting. Fast forward and rewind, less than one minute for 2400 ft. Electro-dynamic brake action and tape tension, never requires adjustment. DC. on preamp heaters. Push-pull 16 watts audio output. Also available with stereo in-line head playback includ- ing dual track record and playback. 50-8,000 cycles at 3 3/4 "/sec. A-520 Pre-amplifier in console cabinet 30-20,000 cycles (-2 db) at 15 sec. 40-12,000 cycles (=2 db) at 7 1/2 "/sec. 90-8,000 cycles at 7i/ 2 " /sec. Dual-track reproducing mechanism with 3^4" tape speed and automatic reversal, giving up to 8 hours of continu- ous music on a 4800-ft. reel. At end of this time, mecha- nism may be made to recycle or stop. Heavy duty capstan drive unit with individual torque motors for each reel. Fast forward and fast rewind. Signal-to-noise, 55 db. Flutter 0.35% at iy 4 " speed. Silence sensing switch and timing accessories available. Long-playing tape reproducing unit consisting of PB-17C tape transport mechanism. Dynamic range, 45 db. New professional-type tape recorder featuring sweep loading, automatic tape lift, new type editing function for run-off of unwanted tape, new cue button for hand cueing without motor or brakes, and new solenoid brakes and pressure pulley. Has a direct-drive hysteresis syn- chronous capstan motor and two torque motors. Three speed ranges of rewind and fast forward. Input can be switched to balanced or unbalanced 600-ohm line, bridg- ing input or microphone input. Illuminated VU meter. Two separate output circuits. Wow and flutter are no more than 0.10% at 15 ips or 0.15% at 7'/ 2 ips. Signal- to-noise ratio is 60 db at 1.07c distortion. Distortion is 1.0% (harmonic) at ± 18 dbm output from 35 to 15,000 cps. Monaural version with either full- or half-track heads. Add $50 to stereo prices for two channel version. The Diplomat Model 8TR3 $219.95 P£> Rangerette' Portable Model A-2 $1500.00 complete 1 3 Y3* p * 1 1 i ty»* • ■ Console Model R-5C with synchronizer $4925.00 70-12,000 cycles at 7y,",sec. 45-15,000 cycles ( =2 db) at 15", sec. 50-8,000 cycles ( 2 db) at 7'/2"/sec. New push-button controlled portable. Two speeds: 7]/ 2 and 3^4 'P s - Input for radio-phonograph. Neon lights for recording level. Speaker is 5" x 7". Ceramic microphone. Pilot light indicates when recorder is on. Power output is 2.5 watts undistorted. Dimensions: 9% 6 " x I8V16" x l4M4g". Rewind time for 7" reel is 2 minutes. Available in charcoal and tan-and-brown cases. New portable recorder. One 6]/ 2 " speaker for low and mid-range frequencies, two V/ 2 " speakers for high fre- quencies. Window counter indicates location of any par- ticular recording on a recorded tape. Auxiliary speaker jack can also be used as earphone jack. Available in gray and green cases. Dimensions: 9 I Me" x n n Aa" x 14%". Otherwise same as above. FOR SYNCHRONOUS SOUND RECORDING Professional-type, single-track, dual -speed recorders, with choice of 3%", 1\/ 2 ", 15" or 30" per second tape speeds. Up to 2 hours recording at 7Y 2 " per sec. on 14" reel. Distortion, less than 2% total harmonic. Maximum signal-to-tape noise, 55 db. Double-puck, tight-loop tape drive. Peak-to-peak flutter, less than 0.1% at 15"/sec. Rewind speed controllable continuously from to 250/ sec. in both forward and rewind. Meets all N.A.B. adopted standards. Complete monitoring and mixing facilities. VU meter, signal indicator and footage counter calibrated in minutes and seconds. Complete tape editing facilities. Also available with positive "sprocketless" synchronization for motion picture and TV applications. Weight of Rangerette — 30 lb. Kits added to other professional recorders for Syn- chronous Sound Recording for $320.00. 14 AIMO RECORD October, 1958 11 Manufacturer THE PENTRON CORPORATION 777 South Tripp Avenue Chicago 24, III. Model and Price Mercury Model NL-1 $159.95 Model NL-1S Stereo $199.95 Champion Model NL-2 $219.95 Model NL-2S Stereo $259.95 Aristocrat Model NL-3 $269.95 Model NL-3S Stereo $309.95 Emperor II Stereo System Model NL-4 Stereo Recorder $450.00 Model ES-2 Speaker System $75.00 PHILCO CORPORATION Philadelphia 34, Pennsylvania Tape Mechanisms TM-1 Monaural $84.50 TM-4 Stereo /Monaural $109.95 Frequency Response 40-1 1,000 cycles at 7'/," sec. 40-7,000 cycles at 3 % " sec. Data Manufacturer Two-speed portable recorder. Features "Finger-Flite" single rotary control for Play, Record, Fast Forward, Fast Rewind. Removable head pole piece allows quick change from half to full track. Interlock record button prevents accidental recording or erasure. Has 6" speaker built in. Signal-to-noise ratio is 45 db. Fast Forward winds 7" reel in 75 seconds. Wow and flutter is under 0.4% at 7'/2 ips. Four-pole motor. Inputs: 1 microphone, 1 radio. Out- puts: 1 amplifier, 1 speaker. Weight: 25 lbs. 40-13,000 cycles at 7'/j"/see. 40-7,000 cycles at 3 3 / t sec. 40-15,000 cycles at 7'/j"/sec. 40-7,500 cycles at 3 % " sec. 40- 1 5,000 cycles at 7'/i"/sec. 40-10,000 cycles at 3% "sec. 40-14,000 cycles at 7'/j" sec. Dynacord Tape Recorder Mechanism only Full or half track $645.00 Stereo $845.00 Pre-amp Studio standard $130.00 Broadcast standard $200.00 LP Magazine R Repeater Model A-l $99.95 Model A-2 $87.95 Model A-3 $79.95 Model A-4 $119.95 Model ST 300 Stereo Recorder $229.95 40-15,000 cycles ( ±2 db) at 15 "/sec. 40-10,000 cycles ( =2 db) at 7 '/ 2 " / sec. 40-7,000 cycles at 33/ 4 sec. 40-15,000 cycles at 7'/, "/sec. Two speed portable recorder. Has "Finger-Flite" single rotary control for Play, Record, Fast Forward, Fast Re- wind. Features a dual extended range speaker system with crossover network: one 6" round PM woofer, 1 exponen- tial 4" tweeter with solid basket. Head has removable pole piece. Amplifier output is 5 watts. Digital index counter. Automatic braking; magic eye record level indi- cator. Signal-to-noise ratio is 48 db. Wow and flutter is under 0.4% at lYl ips. Inputs: 1 microphone, 1 radio. Outputs: 1 amplifier, 1 speaker. Weight: 29 lbs. Dual speed portable tape recorder. "Finger-Flite" single rotary control for Play, Record, Fast Forward, Fast Re- wind. Contains two 6" round PM woofers; one 6" round mid-range; one exponential tweeter with solid basket. Double LC crossover networks with cutoffs at 600 cycles and 2000 cycles. Has 10 watt push-pull amplifier and illuminated VU meter. Signal-to-noise ratio is 50 db. Wow and flutter is under 0.4% at lYl ips Head has removable pole piece. Automatic shut-off switch at end of reel. Two high impedance inputs: one high and one low impedance output. Weight: 3 5 lbs. New home stereo system that can record and play back 2- and 4-channel stereo, and monaural. Speeds: l]/l ar >d 3J4 >P S - "Finger Flite" single rotary control. Safety inter- lock record button. Dual pole erase head. Two 4" x 6" oval speakers. (ES-2 speaker system contains six more.) Power output : 20 watts push-pull. Two electron recording beam level indicators. Signal-to-noise ratio: 50 db. Wow and flutter: under 0.3% at 1Yl 'P s - Index counter. Auto- matic shutoff. Inputs: one for microphone, one for radio/ phono. (Each jack has two input positions.) Outputs: two for external amplifiers, two for external speakers. Dimensions: 17" x 17" x 11". Weight: 45 lbs. New line of tape mechanisms. Single rotary control for Drive, Fast Forward, Fast Rewind. Two speeds: IY2 an d "iY"> >P S - Signal-to-noise ratio is 5 5 db. Flutter is under 0.4% at 7'/2 ip s - Head pole pieces are removable. Four standard pin jack outputs. Two AC convenience outlets. TM-1 is for monaural recording and playback only. TM-4 is for stacked and staggered stereo recording and play- back plus monaural recording and playback. New professional tape recorder available in full or half track monaural version or stereo version. Two speeds: 15 and lYl >P S - Electrical push button operation. Record interlock. Dynamic braking, automatic shutoff. Auto- matic monitoring of output simultaneous with recording. Three motors. Hysteresis synchronous capstan motor. Separate constant torque wind and rewind motors. Wow under 0.15% at 15 ips, 0.25% at V/2 ips. Signal-to- noise ratio: over 5 5 db. Maximum distortion not exceed- ing 3%. Add $50 for mechanism case, $40 for studio standard preamp, $35 for broadcast standard preamp. New series of magazine repeaters playing a regular loop for 28 minutes, Moebius loop for 55 minutes. Stopping by voice operated relay activated by silence on tape between messages. When applicable, signal-to-noise ratio is 45 db, flutter is 0.5%. A-l is complete with amplifier, speaker, triggering circuit, case, handle. A-2 is same without triggering circuit. A-3 includes pre-amp, case, handle. A-4 is recorder/playback, speaker, recorder in- dicator, microphone, case, handle, magazine. New dual track, dual speed recorder for monaural rec- ord/playback and stereo playback. Speeds: 7'/2 and 3^4 ips. Push-button controls. Safety switch prevents acci- dental erase. Pause control. Automatic shutoff. Index timer. Two internal speakers. Tuning eye recording indi- cator. Wow and flutter less than 0.5%. Inputs: one for microphone, one for radio/phono. Outputs: one for external speaker, one for stereo speaker. Dimensions: 9I/2" x 15" x 14". Weight: 39 lbs. JAMES INSTRUMENT LABORATORY 9110 South 52nd Court, Oak Lawn, III. KIMBERLY INDUSTRIES, LTD. 1081 Lexington Avenue New York 21, N. Y KINGDOM PRODUCTS LTD. 514 Broadway New York 12, N. Y MAGNECORD, INC. P.O. Box 7186 Tulsa, Okla. Model and Price Audikon Model V-12 amplifier and mechanism for rack or console mounting $595.00 Carrying Cases $60.00 Phono-Trix Recorder $99.95 Model 100 Series Stereo Recorders WITH FORMICA CASE Mechanical Unit and Pre-amp only $469.95 Speaker Amplifier S159.95 WITH PORTABLE CASE Mechanical Unit and Pre-amp only $449.95 Speaker Amplifier only $129.95 WITHOUT CASE Mechanical Unit only $255.00 Pre-amp only $165.00 Mechanical Unit and Pre-amp only $419.95 Model 728 (Price upon request) Model N35-B Four Pole Motor $299.95 Model NS35-B Hysteresis Synchronous Motor $349.95 Magnecord S36-B Recorder and Preamp. with Case Without Case $415.00 $385.00 Frequency Response 20-20,000 cycles (±3 db) at 15"/ sec. 30-15,000 cycles (±3 db) at 7'/, "/sec. Suitable for voice recording 50-10,000 cycles (±3 db) at 7'/, "/sec. 40-15,000 cycles at 7 V, "/sec. 50-7,500 cycles at 3% "/sec. 30- 1 8,000 cycles (±2 db) at 15"/ sec. 40-15,000 cycles (±2 db) at 7'/j"/sec. 50-10,000 cycles (±2 db) at 3 3 / 4 "/sec. Extended range to 12,000 cycles 50-15,000 cycles (±2 db) at 15" /sec. 50-10,000 cycles (±2 db) at 7y 2 "/sec. Data Two speed, dual track recorder with three-motor drive and electric push-button control via interlocked relays. Hysteresis synchronous direct-drive capstan. Separate record and playback heads permit monitoring from tape while recording. Head assembly has anti-dropout design and automatic tape lifter. Mixing inputs for 250-ohm balanced mike and 500,000 ohm unbalanced line. Cath- ode follower output, plus push-pull 8 watt monitor with independent loudness control : monitors at any level with- out affecting recording level. In-line stereo playback head with dual channel playback pre-amp circuitry al- lows stereo playback with any power amplifier to serve as second channel. Wow and flutter below 0.2% at 1]/l ips. Signal-to-noise ratio: 48 db at lYl ip s » ^4 db at 15 ips. Overall distortion is 1%. Rewind time: 1200 ft. in 40 sec. Mechanism weight: 38 lbs., amplifier: 11 lbs. Variable speed transistorized West German portable tape recorder that operates on four flashlight batteries for 50 recording hours. Speeds variable from 1 to 8 ips. Record- ing time is 30 minutes on each track of 3" reel of tape at 1 ips. Playback through microphone or speaker. Fast rewind. Color-coded slide button operation. Dimensions: 6'/2 x 4J4 x 31/2. Weight: 5 lbs. in case. Dual speed, dual track portable tape recorder that oper- ates on batteries. Speeds: lYl and V/& ip s - Uses iYz" reels that will record 36 minutes per track at V/i ip s - Can be operated closed. Fast rewind. Recording level indicator; battery and motor indicator. Inputs: micro- phone and radio/phono. Output for external speaker. Wow and flutter: 0.4%. Noise level: 35 db. Dimensions: 9H x 5 x iy 6 . Weight: 4'/ 2 lbs. New series of tape recorders for both stereo and mon- aural recording and playback. Two speeds: 7 Yl and 3^4 ips. Separate channel balance controls. Master level con- trol. Individual VU meters for each channel. Four inputs: two microphone-high impedance unbalanced; two high level auxiliary for tuner, phono, tape. Outputs: two cath- ode follower, unbalanced. Binaural monitor phone jack. Recording indicator. Wow and flutter: less than 0.3%. Signal-to-noise ratio: more than 48 db. Distortion: 1% at 10-watt output. Formica cases available in walnut, blond and teak finishes. Add $5 5 for synchronous motor available for all models except the mechanical unit and pre-amp in portable case. New professional design portable for either stereo or monaural recording. Speeds: either 15 and 1Yl 'P s or lYl and 3^4 ips. Hysteresis synchronous motor. Elec- trical pay-off and take-up torques. Push-button controls. Tape position indicator. Can be supplied with full track, half track or stereo heads. Two VU meters. Separate record and playback amplifiers. Individual controls for record gain and master gain. Timing accuracy: ±3 sec- onds in 30 minutes. Signal-to-noise ratio: better than 50 db per channel. Wow and flutter: 0.1% at 15 ips, 0.15% at 7J/2 ips. Output: cathode follower. Input: two high impedance and two unbalanced bridges, two low impedance with plug-in transformer. Panel size: \1Yl x 13 x 10". Weight: 40 lbs. Recorder and 8-watt power amplifier in composite carry- ing case. Tape speeds lYz and 3 J4 ips by capstan change. Phone jack on front panel for monitoring. High im- pedance microphone furnished. High and low impedance outputs for feeding external system. Printed circuit rec- ord amplifier. Interlock prevents accidental tape erasure. 6" x 9" speaker. Illuminated VU meter. Panel size 8Y2" x 15". Weight: 40 lbs. Half-track heads standard. Single unit recorder and preamplifier for rack or port- able mounting. Two-speed, single-track, with capstan speed change and hysteresis synchronous motor drive. Signal-to-noise, 50 db unweighted. Flutter, 0.3%. Re- wind time, 40 sec. for 1200 ft. Erase and record /play- back heads. VU meter for record and playback level. Phone jack for monitoring. Microphone and unbalanced bridging inputs. 600 ohm balanced or unbalanced line output. Weight: 40 lbs. in case. 12 4LDIO RECORD October, 1958 13 Manufacturer Model and Price Magnecord PT6-6A Monaural Recorder Without Case Recorder $375 Amplifier $265 Add $30 for case Magnecord PT6BA2HZ Stereo Recorder Without Case Recorder $450 Amplifier $495 Add $45 for case Magnecord P75 Tape Transport with case $575 without case $535 Amplifier with case $305 without case $265 Frequency Response 50-15,000 cycles (±2 db) at 15"/ sec. 50-7,500 cycles (±2 db) at 7 1/,"/ sec. Data Portable, two-speed, single-track recorder with speed- change switch and hysteresis synchronous drive motor. Signal-to-noise, 50 db. unweighted. Flutter: 0.3% at 15"/sec, 0.4% at 7l/ 2 "/sec. Rewind time, 40 sec. for 1200 ft. with automatic tape lift. Erase and record/play- back heads. VU meter for bias, record and playback level. Monitoring by 5" speaker and phone jack from tape or input. 10 watt power amplifier. Microphone and unbalanced bridging inputs. 4 and 16 ohm power out- puts, 600 ohm line output. MAGNECORD, INC. P. O. Box 7186 Tulsa, Okla. (Other models available) Magnecord Stereophonic P75 Tape Transport Tape Transport with with case $695 Matched Amplifiers without case $655 without case $1,185 Magnecord P73 Tape Transport with case $575 without case $535 Amplifier with case $390 without case $345 »1V vny MAGNETIC RECORDING INDUSTRIES 126 Fifth Avenue New York 11, N. Y. Magnecord M90 Tape Transport with case $995 without case $935 Amplifier with case $390 without case $360 Recorder /Amp. with case $1375 without case $1285 Recorder/Amp. and Console Cabinet, $1450 40-15,000 cycles (±2 db) at 15" /sec. 40-12,000 cycles (±2 db) at 7'/j"/sec. 50-15,000 cycles ( 1 db) at 15 sec. 50-10,000 cycles (±2db) at 7'/, "/sec. Binaural recording version of above. Same specifications except for three speeds (15, iy 2 , 3% ips) with capstan change, 48 db signal-to-noise ratio, and interchannel calibration circuit. Rack-mounted or portable full-track recorder with IOJ/2" reel capacity. Direct drive hysteresis synchronous motor. Push-button controls, instantaneous start and stop, fail- safe brakes and tape break control. Signal-to-noise, 55 db unweighted. Flutter; 0.2% at 15"/sec, 0.25% at 7 /4"/sec. Rewind time, 100 sec. for 2400 ft. Timing accuracy, ± 3 sec. in 30 min. Separate erase, record and playback heads. VU meter for bias, record and playback level. Adjustable bias and high-speed cueing control. Microphone and unbalanced bridging inputs. Phone jack for monitoring from tape or input. 600 ohm unbalanced line output. For recorders with 50-cycle operation, add $75. Tape transport mechanism similar to above, but designed for use with P73-J amplifier instead of P75-C, permitting conversion of existing equipment to new, improved per- formance standards. Signal-to-noise, 50 db unweighted Microphone input, 50 to 250 ohms balanced or unbal- anced. Unbalanced bridge input. Monitoring by 5" speaker and phone jack from tape or input. Amplifier, 600 ohm balanced line output, 4 or 16 ohm, 10 watt speaker output. For recorders with 50-cycle operation, add $75. 30-15,000 cycles (±2 db) at 15" /sec. 30-15,000 cycles ( ±4 db) at 7V 2 "/sec. Magnecord Stereophonic M90 Record /Amplifiers Tape Transport with case $2165 with case $1455 without case $2035 without case $1385 Magnecord 817DLX Long Term Record Unit $1,814 Model MDA Tape Player/ Amplifier $295.00 50-10,000 cycles at 7 V, "/sec. 50-5,000 cycles at 3 % "/sec. to 8,500 cycles at 7i/j"/sec. Portable, professional-type two speed recorder/amplifier units, also available in console cabinet mounting. Elec- trically interlocked push-button controls. Direct-drive hysteresis synchronous motor. Separate erase, record and playback heads — interchangeable assemblies for full track, half-track or instrumentation. Instantaneous start and stop, automatic tape lift. Separate record and play- back amplifiers for simultaneous monitoring from tape. High speed cueing control. Signal-to-noise, 58 db un- weighted. Flutter: 0.1% at 15"/sec, 0.15% at V/>" I sec. Rewind time, 55 sec. for 2400 ft. VU meter for bias, record and playback level. 50 or 250 ohm balanced or unbalanced microphone input, balanced or unbalanced bridge input. Line output, 600 ohms balanced or unbalanced. A long term storage recorder that is completely auto- matic in operation. This single channel, two-speed, rec- ord/playback machine is designed to operate continu- ously for at least 8 hours ( 14" reels — 4800 feet of tape). To avoid any loss of recording information, the erase head has been eliminated. Will record and playback one track in the left -to-right direction, automatically reverse, record and replay the second track in the other direction. It will start and stop on voice signals. Master distribution amplifier complete with tape drive mechanism. Less than Vi% total harmonic distortion at 8 watts. Total power output 10 watts. Complete with master meter system measuring proper output signal being fed into student positions. Sufficient capacity to handle up to 200 student positions. Separate bass and treble controls. Three position selector switch permitting instant flipover from tape to living voice (microphone) or to external source (phonograph, shortwave radio, etc). Complete with 14"xl8" master panel. Manufacturer MAGNETIC RECORDING INDUSTRIES 126 Fifth Avenue New York 11, N. Y. ROBERT C. MERCHANT 2701 Oxford St. Lafayette, Indiana Model and Price Synchrotone Dual Language Recorder Model 68-DL $375.00 Model 68 $337.00 Model 65B, $250.00 Synchro-Magneticon Dual Tape-Disc Recorder-Reproducer Model ML-66, $275 (in portable case, $295) Frequency Response to 8,500 cycles at 7i/j"/sec. METZNER ENGINEERING CORP. 1041 N. Sycamore Avenue Hollywood 38, California Custom Language Teaching Equipment (Prices on request) Starlight "120" Stereo Tape Deck $179.50 MOHAWK BUSINESS MACHINES CORP. 944 Halsey Street Brooklyn 33, N. Y. to 8,000 (tape) to 5,000 (disc) Data Dual recorder-reproducer permitting simultaneous re- cording on two channels, or simultaneous playback of "master" channel and simultaneous recording on "stu- dent" channel; or simultaneous playback of "master" as well as "student" channel. Speeds: 3% and 7J/2 ips. Two record-play safety lights. Concealed selector switch for recording on "master" channel (makes student era- sure of "master" impossible). Inputs: external line and microphone. Two outputs for headphones. Single volume control for both channels. Shut-off switch for external line. Single knob control; beltless drive. Automatic safety switch prevents accidental erasure during rewind; auto- matic shut-off switch; footage index counter. Model 68 is identical to Model 68DL except for auto- matic shut-off switch and footage counter. Model 65B is similar to Model 68 except for belted drive mechanism. Educational language recorder using standard tape and pre-grooved, reusable magnetic discs. Instant stop-start without slurring. Remote control of magnetic disc. Tape speeds iy 4 " or 754". Weight: 22 lbs. 50-13,000 cycles (±2 db) at 7 1/2 "/sec. 40-15,000 cycles ( ±2 db) at 7'/j"/see. Mohawk "Midgetape" 300 All Transistorized 1 Battery Operated Pocket Tape Recorder $249.50 NORTH AMERICAN PHILIPS CO., INC. 230 Duffy Ave. Hicksville, N. Y. Mohawk Message Repeater Record-Playback Unit $159.50 Playback Unit $99.50 ■"> \ Norelco "Continental" Portable Recorder Model EL 3516 $269.50 New Model MC series multi-channel language laboratory recording equipment featuring Mark IV console. Can handle up to 40 students and two teachers. Has cast- aluminum transport with full solenoid controls on all functions. "Piano Key" controls. Automatic shut-off. Automatic selection locator. Start, stop, and rewind by remote control. Signal-to-noise over 45 db. Flutter below 0.2%, Wow below 0.05%. Amplifier designed for lan- guage laboratory with preset input and output levels of 1.228 volts for VU meters. Compensated for crystal microphones and earphones as furnished with recorder. Electronic eye recording level indicator. Earphone vol- ume adjustable by student from 60 db to 80 db level. Other series and models available including full transistor versions with automatic volume control. New tape transport mechanism that records and plays stereo. Two speeds: 1]/ 2 and iy 4 ips. Hysteresis syn- chronous motor. Flywheel loaded capstan drive. Index counter. Shielded head. Interlocked controls. Wow and flutter under 0.18% at 71/2 ips. Stereo head inductance 400 mhy. for high output voltage. Timing accuracy bet- ter than 0.2%. Signal-to-noise ratio: 55 db. Fast forward at 1 1.77sec. Connections to heads at sub-mounted phono- type jacks. 150-5,500 cycles at 1 7 / 8 "/sec. 200-5,500 cycles (±iy 2 db) at 3 % "/sec. 40-16,000 cycles at 7yj"/sec. 50-8,000 cycles at 3 V 4 "/sec. 60-4,500 cycles at 1 % "/sec. Portable recorder. Instantly records and plays right back. No electricity required. Battery life 12 to 50 hrs. 4 tran- sistors. Optional internal transistorized loudspeaker. 1 or V/2 hr. cartridge-loaded tape. 3 controls: On-Off, Play- Record and Volume. Wow and flutter, less than 0.7%. Signal-to-noise ratio, 42 db. Input, 2,000 ohms-one mv min. Output, 10 milliwatts at 2,000 ohms. Tape used: !4" "Mylar" base, twin track. Supplied with battery, comb, microphone/speaker and 1 hr. tape. Accessories available. Size: 8l/ 2 " x 3%" x 17/g". Weight: 3 lbs. Midget, recorder/playback unit with continuous-loop tape cartridges of from 15 to 240 seconds capacity. Re- peats message continuously or intermittently by external switch control. No rewinding necessary. Neon bulb recording level indicator. Built-in 5" speaker. Output, 1.2 watts. Plug-in sockets for microphone, external start, external amplifier or speaker. Overall size, 6'/ 7 " x ">V A " x 5^2". Weight: 5% lb. Amplifier /Speaker $95.00 Norelco "Continental" Portable Stereo Recorder Model EL3516G/73 $299.50 40-16,000 cycles at 7i/j"/sec. 50-10,000 cycles at 3 % "/sec. 60-5,000 cycles at iy 8 "/sec. Three-speed, dual track, push-button controlled portable recorder. Has "magic eye" volume indicator, piano-key controls. Head has air gap of only 0.0002". Contains 5" twin-cone speaker. Signal-to-noise ratio is 54 db. Wow and flutter is 0.2% at 7l/ 2 ips, 0.3% at 3% ips, 0.35% at l^g ips. Fast forward and reverse: less than 2 minutes for 1200 feet. Automatic stop at end of reel with metal - ized tape. Inputs: one radio/phono, one microphone. Outputs: one external speaker, one external amplifier. Dimensions: 16" x 13" x 8". Weight: 30 lbs. Stereo version of above. Same specifications as above except for following. Wow and flutter is 0.15% at 7'/2 ips, 0.2% at 3% ips, 0.35% at 1% ips. Five outputs: three for external amplifiers, one for external speaker, one for monitor. Second amplifier and speaker are in a matching cabinet.